nylon Imported WARM: Down-like synthetic insulation creates thick channels of warmth between the baby and the outside air. VERSATILE: Patent-pending design comfortably fits babies from 6 months to 18 months old. Zips from the bottom-up for easy diaper changes without removing the sleeping bag. Machine-washable. SAFE: Designed to meet all AAP-recommended guidlines for safe infant sleep. Has no hood or drawstrings, and the snug, secure collar keeps babies from slipping inside. COMFORTABLE: Details like a fleece zipper flap, enclosed footbox, and insulated draft tube keeps baby comfortable and warm all night long. LIGHTWEIGHT: Weighs just 14 ounces (391 grams) and packs down to the size of a large water bottle. Introducing the Little Mo Baby Sleeping Bag, designed for babies aged 6-18 months, perfect for backpacking and 3-season camping. This mummy-shaped sleeping bag is made of 100% Ripstop Nylon, featuring 650 fill-power RDS-Certified White Duck Down insulation, ensuring warmth even in temperatures ranging from 20 to 60F (-6C to 15C). The bag is 31 inches long, with adjustable open-and-close cuffs on the sleeves for the down version. The fill weight is 3.88oz (110g), and the weight is 8.7oz (247g), making it lightweight and portable. The product is machine washable, following the provided care instructions for best results. The Little Mo Baby Sleeping Bag is available in Leapfrog Green color and complies with safe sleep checklist guidelines for your baby's safety. Experience the outdoors with your baby with Morrison Outdoors' Little Mo Baby Sleeping Bag.