Designed to be worn over pyjamas, aden + anais™ mid-season muslin baby sleeping bags 1.5 TOG eliminate the need for loose blankets in the crib for a safer sleep. Made from four layers of 100% cotton muslin, the mid-season sleeping bag is perfect for room temperatures between 20-22°C. The multi-layer sleeping bag helps keep baby feeling comfy and secure when transitioning out of a swaddle and beyond. It also zips open from the bottom, making nighttime changes easier.