Mix and match these TOG-rated Layers, designed to be worn as a pyjama underneath any of our swaddles, sleeping bags, sleep suits or sleep onesies. They're so sweet, we guarantee you'll want extra for daywear too! Our Layers are made from a deliciously soft, stretchy organic jersey cotton for comfort and warmth during sleep. The slim-fit designs prevents bunching underneath your child's pouch, and the breathable, natural fibres help regulate body temperature and prevent overheating. Parents can follow the FREE room thermometer and What to Wear guide provided with our pouches to find the perfect under-layer for their little one, whatever your room temperature.