The Living Textiles Smart Sleep sleeping bag is made with a soft and breathable 100% cotton jersey inner and outer shell and is perfect for babies who have transitioned out of a swaddle. Designed to be used instead of blankets for safety - this sleeping bag helps to minimize the risk of SIDS & prevent your baby from waking up uncovered. The fitted neck and armholes, with additional press stud for smaller babies, reduce the possibility of slipping, whilst maintaining complete freedom to move with a hip-healthy bell shape design.