Say hello to the ergoPouch Sleep Onesie! A perfect sleepwear choice for the baby who refuses sleeping bags. An absolute winner with parents, this padded onesie keeps a child covered and warm all night. Designed to be worn on its own or with a Layer underneath for comfort. The Sleep Onesie is ideal for toddlers or preschoolers transitioning into a big bed (and still kick their sheets off). Choose a 3.5 TOG for cool room temperatures between 14-21C°.