WARM: Thick channels of 100% RDS-certified down surround the child with warmth when temperatures drop. Internal baffles keep down from shifting and prevent cold spots. Sleeve ends are closed for maximum warmth. SAFE: Designed to meet all AAP-recommended guidelines for safe infant sleep. Has no hood or drawstrings, and the snug, secure collar keeps babies from slipping inside. VERSATILE: Patent-pending design comfortably fits babies from 6 months to 24 months old. Zips from the bottom-up for easy diaper changes without removing the sleeping bag. Machine-washable. COMFORTABLE: Details like a fleece zipper flap, enclosed footbox, and down-filled draft tube keep baby comfortable and warm all night long. ULTRALIGHT: Weighs just 9 ounces (245 grams) and packs down to the size of a water bottle. Gently used, in great condition.