The Cosmic 40 is a lightweight down sleeping bag designed for warm weather camping. It features 550-fill down for comfortable warmth on cool nights and a nylon exterior to protect the down from snags. The DWR treatment helps maintain loft in damp conditions. The bag includes a full-length draft tube and collar to reduce heat loss, two-way zippers for ventilation, and an internal zippered pocket. It comes with a stuff sack that packs down small for easy transport.