In the lightweight sleeping bag, your baby feels safe and secure when transitioning from the swaddle to the sleeping bag. This baby sleeping bag can easily be slipped over pajamas and replaces loose blankets in the crib – ensuring a safe night's sleep. The sleeping bag allows for air circulation and reduces the risk of overheating, so you and your baby can sleep peacefully. The practical zipper opens from the bottom, making nighttime diaper changes easy. 1.0 TOG: Well suited for warmer rooms (22 to 24 °C). All materials from aden + anais are made without azo dyes. All packaging from aden + anais is recyclable and meets the requirements of the Green Dot Initiative.