The Clever Sleep Sack 1.5 TOG is the perfect bedding for all year round. It's crafted in our signature organic cotton and bamboo from viscose fabric which is breathable and thermoregulating to help keep your baby or toddler at the perfect temperature all night. The fitted neck and armholes ensure there is no danger of slipping, whilst maintaining the freedom to move. It also features a double-direction zipper to make nighttime changes a little bit easier.