Loulou Lollipop Sleeper - Tiny EngineersSofter against skin than cotton, breathable enough to prevent overheating the Loulou Lollipop Big Dreams Sleeper in Tiny Engineers helps your baby sleep longer and wake up less. Made from TENCEL Lyocell with spandex for stretch, this footie pajama actively manages body heat and sweat to reduce temperature related sleep interruptions, allowing for deeper sleep cycles. The fabric is naturally hypoallergenic and gentle on sensitive skin ideal for babies