22,250 Sleep Pattern Vectors, Clipart, Icons, Backgrounds And Graphic Designs - Ready For Royalty Free Download From Dreamstime`s Creative Contributors.

Vector outline illustration of a traditional dreamcatcher featuring an intricate geometric mandala pattern within the hoop, decorative stars, and hanging feathers and beads. Ideal for coloring books, bohemian design, tribal art, and relaxation therapy. Sleep pattern vectors
Vector outline illustration of a traditional dreamcatcher featuring an intricate geometric mandala pattern within the hoop, decorative stars, and hanging feathers and beads. Ideal for coloring books, bohemian design, tribal art, and relaxation therapy. Sleep pattern vectors
Vector set for printing on children's products. Cute calf in pajamas, on dark background with stars. Print for printing and seamless vector pattern. Vector illustration. Sleep pattern vectors
Vector set for printing on children's products. Cute calf in pajamas, on dark background with stars. Print for printing and seamless vector pattern. Vector illustration. Sleep pattern vectors
Mattress line icon. Continuous line with share plane. Orthopedic latex pad sign. Breathable sleep bed symbol. 3d star in speech bubble. Latex mattress single line ribbon. Loop curve pattern. Vector. Sleep pattern vectors
Mattress line icon. Continuous line with share plane. Orthopedic latex pad sign. Breathable sleep bed symbol. 3d star in speech bubble. Latex mattress single line ribbon. Loop curve pattern. Vector. Sleep pattern vectors
A simple and stylish illustration of a crescent moon and stars, perfect for adding a touch of whimsy to your designs. This graphic is great for kids' products, sleep-themed projects, or anything that needs a celestial touch. Sleep pattern vectors
A simple and stylish illustration of a crescent moon and stars, perfect for adding a touch of whimsy to your designs. This graphic is great for kids' products, sleep-themed projects, or anything that needs a celestial touch. Sleep pattern vectors
Big colored doodle sleeping mask set with geometric, animal and flower pattern, lettering, lace decoration. Lovely hand drawn girly eye mask for total relaxation. Bedtime accessory isolated on white. Sleep pattern vectors
Big colored doodle sleeping mask set with geometric, animal and flower pattern, lettering, lace decoration. Lovely hand drawn girly eye mask for total relaxation. Bedtime accessory isolated on white. Sleep pattern vectors
Big colored line doodle sleeping mask set with animal head, geometric pattern, lettering. Lovely hand drawn patterned eye mask for kids, women. Bedtime accessory for good night, comfort rest. Sleep pattern vectors
Big colored line doodle sleeping mask set with animal head, geometric pattern, lettering. Lovely hand drawn patterned eye mask for kids, women. Bedtime accessory for good night, comfort rest. Sleep pattern vectors
Lovely colourful doodle sleeping mask set with checkered, cow pattern, sunflower, Sweet Dreams lettering, star, Funny hand drawn girly eye mask for comfort rest. Patterned bedtime accessory isolated. Sleep pattern vectors
Lovely colourful doodle sleeping mask set with checkered, cow pattern, sunflower, Sweet Dreams lettering, star, Funny hand drawn girly eye mask for comfort rest. Patterned bedtime accessory isolated. Sleep pattern vectors
Lovely outline doodle sleeping mask set with scribble pattern, sunflower, Good Night lettering, childish cloud, Funny hand drawn girly eye mask for sweet dreams. Decorated bedtime accessory isolated. Sleep pattern vectors
Lovely outline doodle sleeping mask set with scribble pattern, sunflower, Good Night lettering, childish cloud, Funny hand drawn girly eye mask for sweet dreams. Decorated bedtime accessory isolated. Sleep pattern vectors
Cute brown teddy bears on a hand drawn yellow dots texture background with orange stars and moon, kids seamless pattern background for boy and girl. Wrapping paper design, fabric and textile print. Sleep pattern vectors
Cute brown teddy bears on a hand drawn yellow dots texture background with orange stars and moon, kids seamless pattern background for boy and girl. Wrapping paper design, fabric and textile print. Sleep pattern vectors
Slippers seamless pattern, flip flops. Doodle outline pattern with slippers isolated on white. Slippers wrapper, wallpaper for bedroom, textiles, decoration, pajama. Drawn adult coloring page, book. Sleep pattern vectors
Slippers seamless pattern, flip flops. Doodle outline pattern with slippers isolated on white. Slippers wrapper, wallpaper for bedroom, textiles, decoration, pajama. Drawn adult coloring page, book. Sleep pattern vectors
Cute line sleeping mask with lettering Good Night and heart pattern. Funny girly doodle eye mask. Hand drawn bedtime accessory for sweet dreaming to prevent insomnia isolated on white background. Sleep pattern vectors
Cute line sleeping mask with lettering Good Night and heart pattern. Funny girly doodle eye mask. Hand drawn bedtime accessory for sweet dreaming to prevent insomnia isolated on white background. Sleep pattern vectors
A set of vector prints for printing on children's products. Cute bear flying in space with star, seamless vector pattern with stars on dark background. Vector illustration. Sleep pattern vectors
A set of vector prints for printing on children's products. Cute bear flying in space with star, seamless vector pattern with stars on dark background. Vector illustration. Sleep pattern vectors
Lovely cartoon sleeping mask set with line, cow pattern, check ornament, Sweet Dreams lettering. Funny hand drawn girlish eye mask for perfect rest. Patterned bedding accessory isolated on white. Sleep pattern vectors
Lovely cartoon sleeping mask set with line, cow pattern, check ornament, Sweet Dreams lettering. Funny hand drawn girlish eye mask for perfect rest. Patterned bedding accessory isolated on white. Sleep pattern vectors
Vector illustration of a person struggling to sleep, holding their head in frustration against a night-themed background with clouds and exclamation marks, representing insomnia. Sleep pattern vectors
Vector illustration of a person struggling to sleep, holding their head in frustration against a night-themed background with clouds and exclamation marks, representing insomnia. Sleep pattern vectors
Cute outline sleeping mask with stars pattern. Simple girly eye mask. Hand drawn bedtime accessory for comfort dreaming to prevent insomnia. Black and white doodle isolated on white background. Sleep pattern vectors
Cute outline sleeping mask with stars pattern. Simple girly eye mask. Hand drawn bedtime accessory for comfort dreaming to prevent insomnia. Black and white doodle isolated on white background. Sleep pattern vectors
Lovely cartoon sleeping mask set with animal pattern, wide lines, check, cloud, funny lettering. Cute hand drawn eye mask for comfortable dreaming. Patterned bedtime accessory isolated on white. Sleep pattern vectors
Lovely cartoon sleeping mask set with animal pattern, wide lines, check, cloud, funny lettering. Cute hand drawn eye mask for comfortable dreaming. Patterned bedtime accessory isolated on white. Sleep pattern vectors
Lovely cartoon sleeping mask set with geometric line pattern, abstract blobs, stars, Oops lettering. Hand drawn girly eye mask for comfort relaxation. Patterned bedtime accessory isolated on white. Sleep pattern vectors
Lovely cartoon sleeping mask set with geometric line pattern, abstract blobs, stars, Oops lettering. Hand drawn girly eye mask for comfort relaxation. Patterned bedtime accessory isolated on white. Sleep pattern vectors
Lovely black and white sleeping mask set with animal pattern, wide lines, cloud, funny lettering. Cute hand drawn eye mask for comfortable dreaming. Patterned bedtime accessory doodle collection. Sleep pattern vectors
Lovely black and white sleeping mask set with animal pattern, wide lines, cloud, funny lettering. Cute hand drawn eye mask for comfortable dreaming. Patterned bedtime accessory doodle collection. Sleep pattern vectors
Lovely outline sleeping mask set with line, cow pattern, scribble ornament, Oops lettering. Funny hand drawn girlish eye mask for perfect rest. Patterned dreaming accessory isolated on white. Sleep pattern vectors
Lovely outline sleeping mask set with line, cow pattern, scribble ornament, Oops lettering. Funny hand drawn girlish eye mask for perfect rest. Patterned dreaming accessory isolated on white. Sleep pattern vectors
Cute cartoon sleeping mask with stars pattern. Funny girly pink eye mask. Hand drawn bedtime accessory for comfort dreaming to prevent insomnia. Colorful clipart isolated on white background. Sleep pattern vectors
Cute cartoon sleeping mask with stars pattern. Funny girly pink eye mask. Hand drawn bedtime accessory for comfort dreaming to prevent insomnia. Colorful clipart isolated on white background. Sleep pattern vectors
Sun, moon, star and clouds watercolor seamless pattern isolated on white. Hand painted high quality clip art illustrations. Perfect St Valentine day, for love cards, posters, textile decor. Clip art. Sleep pattern vectors
Sun, moon, star and clouds watercolor seamless pattern isolated on white. Hand painted high quality clip art illustrations. Perfect St Valentine day, for love cards, posters, textile decor. Clip art. Sleep pattern vectors
Cute cartoon sleeping mask with lettering Good Night and heart pattern. Funny girly pink eye mask. Hand drawn bedtime accessory for sweet dreaming to prevent insomnia isolated on white background. Sleep pattern vectors
Cute cartoon sleeping mask with lettering Good Night and heart pattern. Funny girly pink eye mask. Hand drawn bedtime accessory for sweet dreaming to prevent insomnia isolated on white background. Sleep pattern vectors
A collection of charming stickers depicting cozy scenes like tea, books, and sleep, conveying a mood of rest and rejuvenation perfect for digital planners or social media. Sleep pattern vectors
A collection of charming stickers depicting cozy scenes like tea, books, and sleep, conveying a mood of rest and rejuvenation perfect for digital planners or social media. Sleep pattern vectors
Body pregnancy pillow. Seamless pattern. Coloring Page. Comfortable orthopedic device for sleeping and relaxing. Hand drawn style. Vector drawing. Collection of design ornaments. Sleep pattern vectors
Body pregnancy pillow. Seamless pattern. Coloring Page. Comfortable orthopedic device for sleeping and relaxing. Hand drawn style. Vector drawing. Collection of design ornaments. Sleep pattern vectors
Four black t-shirts each feature different gym-themed typography designs. The first t-shirt has "TRAIN HARD" with a barbell graphic. The second shows "MEET ME AT THE GYM" inside a white circular pattern. The third reads "THE PAIN YOU FEEL TODAY WILL BE THE STRENGTH YOU FEEL TOMORROW" with kettlebell and dumbbell graphics. The fourth displays "EAT TRAIN SLEEP GAIN" with a stylized arrow. All designs use bold, contrasting colors like red, orange, and yellow. Sleep pattern vectors
Four black t-shirts each feature different gym-themed typography designs. The first t-shirt has "TRAIN HARD" with a barbell graphic. The second shows "MEET ME AT THE GYM" inside a white circular pattern. The third reads "THE PAIN YOU FEEL TODAY WILL BE THE STRENGTH YOU FEEL TOMORROW" with kettlebell and dumbbell graphics. The fourth displays "EAT TRAIN SLEEP GAIN" with a stylized arrow. All designs use bold, contrasting colors like red, orange, and yellow. Sleep pattern vectors
A whimsical vector illustration depicting a dreamcatcher resting on a fluffy cloud. This ethereal image evokes a sense of lightness, airiness, and the dreamy quality of imagination. Ideal for children's books, sleep aids, or designs that aim to inspire creativity and positive thoughts, symbolizing elevated dreams and a carefree spirit, vector design Generative AI. Sleep pattern vectors
A whimsical vector illustration depicting a dreamcatcher resting on a fluffy cloud. This ethereal image evokes a sense of lightness, airiness, and the dreamy quality of imagination. Ideal for children's books, sleep aids, or designs that aim to inspire creativity and positive thoughts, symbolizing elevated dreams and a carefree spirit, vector design Generative AI. Sleep pattern vectors
A cute vector illustration of a cartoon bear peacefully sleeping on a pillow. Represents comfort, relaxation, and restful sleep. Ideal for children's products, bedtime stories, or themes of tranquility and sweet dreams, vector design Generative AI. Sleep pattern vectors
A cute vector illustration of a cartoon bear peacefully sleeping on a pillow. Represents comfort, relaxation, and restful sleep. Ideal for children's products, bedtime stories, or themes of tranquility and sweet dreams, vector design Generative AI. Sleep pattern vectors
Ornamental vector illustration of a traditional dreamcatcher with feathers and intricate patterns. Represents protection, dreams, spirituality, or cultural motifs. Suitable for decorative purposes, bohemian designs, spiritual content, or graphics related to sleep and folklore, vector design Generative AI. Sleep pattern vectors
Ornamental vector illustration of a traditional dreamcatcher with feathers and intricate patterns. Represents protection, dreams, spirituality, or cultural motifs. Suitable for decorative purposes, bohemian designs, spiritual content, or graphics related to sleep and folklore, vector design Generative AI. Sleep pattern vectors
A minimalist illustration featuring a dark gray crescent moon adorned with three golden stars. The design is clean, modern, and flat, suitable for various applications such as websites, apps, or print materials related to sleep, dreams, Islam, or astronomy. The image offers a simple yet evocative representation of the night sky. Sleep pattern vectors
A minimalist illustration featuring a dark gray crescent moon adorned with three golden stars. The design is clean, modern, and flat, suitable for various applications such as websites, apps, or print materials related to sleep, dreams, Islam, or astronomy. The image offers a simple yet evocative representation of the night sky. Sleep pattern vectors
Cute illustration of an owl character wearing a sleeping cap, tucked into bed and fast asleep. Represents sleep, rest, bedtime, or cozy comfort vector design Generative AI. Sleep pattern vectors
Cute illustration of an owl character wearing a sleeping cap, tucked into bed and fast asleep. Represents sleep, rest, bedtime, or cozy comfort vector design Generative AI. Sleep pattern vectors
Cute funny pillow with happy face. Seamless pattern. Coloring Page. Cartoon kawaii character. Hand drawn style. Vector drawing. Collection of design ornaments. Sleep pattern vectors
Cute funny pillow with happy face. Seamless pattern. Coloring Page. Cartoon kawaii character. Hand drawn style. Vector drawing. Collection of design ornaments. Sleep pattern vectors
A serene vector illustration depicting a peaceful night sky with the moon, stars, and clouds. Perfect for themes of dreams, sleep, evening tranquility, astronomy, and calming nocturnal scenes for various design uses, vector design Generative AI. Sleep pattern vectors
A serene vector illustration depicting a peaceful night sky with the moon, stars, and clouds. Perfect for themes of dreams, sleep, evening tranquility, astronomy, and calming nocturnal scenes for various design uses, vector design Generative AI. Sleep pattern vectors
Faceless illustration of a person with dark skin wearing green pajamas and a sleep cap, holding an iridescent sticky note with "2026" written on it. This image symbolizes future planning, new year resolutions, personal goals, and upcoming events. Isolated on a clean white background with ample copy space. Generated by AI. Sleep pattern vectors
Faceless illustration of a person with dark skin wearing green pajamas and a sleep cap, holding an iridescent sticky note with "2026" written on it. This image symbolizes future planning, new year resolutions, personal goals, and upcoming events. Isolated on a clean white background with ample copy space. Generated by AI. Sleep pattern vectors
A dreamy vector illustration of a night sky featuring the Milky Way and constellations. Soft whites and deep blues evoke wonder, ideal for stargazing apps, sleep aid products, or nature photography collections. Sleep pattern vectors
A dreamy vector illustration of a night sky featuring the Milky Way and constellations. Soft whites and deep blues evoke wonder, ideal for stargazing apps, sleep aid products, or nature photography collections. Sleep pattern vectors
A comfortable double bed icon, symbolizing hotel accommodation, bedroom furniture, and restful sleep. This vector illustration is ideal for hospitality, interior design, real estate, or lifestyle apps. It represents comfort, relaxation, and a peaceful environment for sleeping, vector design Generative AI. Sleep pattern vectors
A comfortable double bed icon, symbolizing hotel accommodation, bedroom furniture, and restful sleep. This vector illustration is ideal for hospitality, interior design, real estate, or lifestyle apps. It represents comfort, relaxation, and a peaceful environment for sleeping, vector design Generative AI. Sleep pattern vectors
A soothing vector icon of a crescent moon and two stars. Ideal for sleep apps, night themes, or astrological content. Represents bedtime, dreams, and cosmic elements. Gentle and relaxing for various digital and print media, vector design Generative AI. Sleep pattern vectors
A soothing vector icon of a crescent moon and two stars. Ideal for sleep apps, night themes, or astrological content. Represents bedtime, dreams, and cosmic elements. Gentle and relaxing for various digital and print media, vector design Generative AI. Sleep pattern vectors
Generate a vector illustration of a dreamcatcher with intricate details. The dreamcatcher should have a circular frame with a web-like pattern inside. Several feathers should hang from the bottom, styled in a detailed, slightly stylized manner. The color palette should be a single dark navy blue against a white background. The style should be clean and minimalist, with bold lines and a focus on the intricate details of the dreamcatcher and feathers. The overall mood should be peaceful and spiritual. Sleep pattern vectors
Generate a vector illustration of a dreamcatcher with intricate details. The dreamcatcher should have a circular frame with a web-like pattern inside. Several feathers should hang from the bottom, styled in a detailed, slightly stylized manner. The color palette should be a single dark navy blue against a white background. The style should be clean and minimalist, with bold lines and a focus on the intricate details of the dreamcatcher and feathers. The overall mood should be peaceful and spiritual. Sleep pattern vectors
A peaceful bedroom setting with a comfortable bed and bedside lamp, suggesting relaxation and personal space. This illustration is perfect for home furnishing brands, interior design blogs, real estate, or any design that aims to convey comfort, peaceful sleep, and a welcoming domestic environment, ideal for restful nights, vector design Generative AI. Sleep pattern vectors
A peaceful bedroom setting with a comfortable bed and bedside lamp, suggesting relaxation and personal space. This illustration is perfect for home furnishing brands, interior design blogs, real estate, or any design that aims to convey comfort, peaceful sleep, and a welcoming domestic environment, ideal for restful nights, vector design Generative AI. Sleep pattern vectors
A charming illustration of a baby crib, adorned with a cosmic mobile featuring planets and stars, creating dreamy nursery decor. This image evokes childhood, imagination, comfort, and peaceful sleep. Perfect for baby product brands, nursery design, children's books, and parenting blogs, vector design Generative AI. Sleep pattern vectors
A charming illustration of a baby crib, adorned with a cosmic mobile featuring planets and stars, creating dreamy nursery decor. This image evokes childhood, imagination, comfort, and peaceful sleep. Perfect for baby product brands, nursery design, children's books, and parenting blogs, vector design Generative AI. Sleep pattern vectors
A warm vector illustration of a cozy bedroom interior with a comfortable bed and nightstand. Perfect for home decor blogs, real estate listings, or designs promoting restful sleep and personal comfort. This graphic creates an inviting and serene atmosphere, ideal for relaxation, vector design Generative AI. Sleep pattern vectors
A warm vector illustration of a cozy bedroom interior with a comfortable bed and nightstand. Perfect for home decor blogs, real estate listings, or designs promoting restful sleep and personal comfort. This graphic creates an inviting and serene atmosphere, ideal for relaxation, vector design Generative AI. Sleep pattern vectors
A serene illustration of a peaceful night landscape featuring a solitary tree and rolling hills under a starry sky. This image evokes tranquility, introspection, and the quiet beauty of nature after dark. Perfect for sleep, mindfulness, or calm themes, vector design Generative AI. Sleep pattern vectors
A serene illustration of a peaceful night landscape featuring a solitary tree and rolling hills under a starry sky. This image evokes tranquility, introspection, and the quiet beauty of nature after dark. Perfect for sleep, mindfulness, or calm themes, vector design Generative AI. Sleep pattern vectors
A vibrant orange icon of a crescent moon, symbolizing night, celestial beauty, or mystical themes. This warm design is ideal for sleep apps, astronomy content, or decorative elements, offering a peaceful and inviting visual for various applications, vector design Generative AI. Sleep pattern vectors
A vibrant orange icon of a crescent moon, symbolizing night, celestial beauty, or mystical themes. This warm design is ideal for sleep apps, astronomy content, or decorative elements, offering a peaceful and inviting visual for various applications, vector design Generative AI. Sleep pattern vectors
A simple and charming vector of a clock at night. This image is perfect for illustrating concepts like nighttime, dreams, and the passing of time. It's a lovely graphic for children's books and apps related to sleep or scheduling now, vector design Generative AI. Sleep pattern vectors
A simple and charming vector of a clock at night. This image is perfect for illustrating concepts like nighttime, dreams, and the passing of time. It's a lovely graphic for children's books and apps related to sleep or scheduling now, vector design Generative AI. Sleep pattern vectors
A cute sleeping crescent moon with sparkling stars, symbolizing peaceful nights and sweet dreams. This charming graphic is perfect for children's books, bedtime stories, or lullaby music covers. Its whimsical design and gentle colors evoke tranquility and wonder, ideal for nursery decor, sleep apps, or soothing content for young audiences, vector design Generative AI. Sleep pattern vectors
A cute sleeping crescent moon with sparkling stars, symbolizing peaceful nights and sweet dreams. This charming graphic is perfect for children's books, bedtime stories, or lullaby music covers. Its whimsical design and gentle colors evoke tranquility and wonder, ideal for nursery decor, sleep apps, or soothing content for young audiences, vector design Generative AI. Sleep pattern vectors
A minimalist single bed, symbolizing rest, relaxation, and bedroom comfort. Ideal for dorm rooms, hotels, and interior design concepts. Represents simplicity and a peaceful sleep environment, perfect for hospitality and wellness designs, vector design Generative AI. Sleep pattern vectors
A minimalist single bed, symbolizing rest, relaxation, and bedroom comfort. Ideal for dorm rooms, hotels, and interior design concepts. Represents simplicity and a peaceful sleep environment, perfect for hospitality and wellness designs, vector design Generative AI. Sleep pattern vectors
A charming vector icon depicting a cloud with a crescent moon, symbolizing nighttime or celestial themes. This design is perfect for weather forecasts, sleep apps, bedtime stories, or any project related to astronomy and the night sky. It evokes a peaceful, serene atmosphere, vector design Generative AI. Sleep pattern vectors
A charming vector icon depicting a cloud with a crescent moon, symbolizing nighttime or celestial themes. This design is perfect for weather forecasts, sleep apps, bedtime stories, or any project related to astronomy and the night sky. It evokes a peaceful, serene atmosphere, vector design Generative AI. Sleep pattern vectors
A serene vector illustration of lavender flowers with butterflies fluttering under a crescent moon. Evokes calmness, nighttime tranquility, and the gentle beauty of nature. Ideal for aromatherapy themes, sleep aids, and peaceful designs, vector design Generative AI. Sleep pattern vectors
A serene vector illustration of lavender flowers with butterflies fluttering under a crescent moon. Evokes calmness, nighttime tranquility, and the gentle beauty of nature. Ideal for aromatherapy themes, sleep aids, and peaceful designs, vector design Generative AI. Sleep pattern vectors
Colorful illustration depicts peaceful dreams with fluffy clouds, a smiling moon, and stars creating a whimsical and comforting mood perfect for children's designs or sleep-related content. Sleep pattern vectors
Colorful illustration depicts peaceful dreams with fluffy clouds, a smiling moon, and stars creating a whimsical and comforting mood perfect for children's designs or sleep-related content. Sleep pattern vectors
Illustration of a crescent moon with a face and stars in the night sky, integrated with constellations. Represents celestial bodies, dreams, or whimsical night themes. Suitable for children's designs or projects related to sleep and astronomy, vector design Generative AI. Sleep pattern vectors
Illustration of a crescent moon with a face and stars in the night sky, integrated with constellations. Represents celestial bodies, dreams, or whimsical night themes. Suitable for children's designs or projects related to sleep and astronomy, vector design Generative AI. Sleep pattern vectors
A serene vector illustration of a crescent moon in a night sky above a line of pine trees. This image symbolizes night, tranquility, nature's peace, and contemplation. Ideal for relaxation, sleep, or outdoor themes, conveying calm and natural beauty, vector design Generative AI. Sleep pattern vectors
A serene vector illustration of a crescent moon in a night sky above a line of pine trees. This image symbolizes night, tranquility, nature's peace, and contemplation. Ideal for relaxation, sleep, or outdoor themes, conveying calm and natural beauty, vector design Generative AI. Sleep pattern vectors
A warm and inviting bedroom interior at night, with a bed and window, evoking peace, comfort, and restful sleep. This illustration is perfect for home decor, sleep aid apps, lifestyle blogs, or any design that aims to convey serenity, personal well-being, and the tranquility of a quiet evening, ideal for calming atmospheres, vector design Generative AI. Sleep pattern vectors
A warm and inviting bedroom interior at night, with a bed and window, evoking peace, comfort, and restful sleep. This illustration is perfect for home decor, sleep aid apps, lifestyle blogs, or any design that aims to convey serenity, personal well-being, and the tranquility of a quiet evening, ideal for calming atmospheres, vector design Generative AI. Sleep pattern vectors