ergoPouch 1.0 TOG Sleep Onesie is designed to be worn on its own during sleep or with rompers or pajamas underneath for warmth and comfort. These are the perfect option for toddlers or preschoolers transitioning into a big bed, sleepwalkers, kids who kick off their blankets or little starfish who don't like the restriction of a sleep sack. The sleep onesie is made from gots certified organic cotton and bamboo that is non-toxic and gentle on irritable skin. The stretchy material allows your little one to move freely and stay comfortable for sleep and the 3-way zip configuration is helpful for overnight diaper changes or toilet trips, and cuffs on the feet keep little toes warm.