What Our Gearhead(R) Experts Are Saying:"This bag is a cold-weather champ. It's warm, lightweight, and packs down nicely for easy transport. I love the roomy foot box and cozy synthetic insulation-it's like a personal cocoon on chilly nights."The Cosmic Synthetic 0degF Sleeping Bag proves that staying warm under the stars doesn't have to break the bank. With CirroLoft ECO insulation made from 100% recycled fibers, this mummy bag delivers lightweight, compressible warmth that's easy to pack and perfect for even wintry adventures. Its durable nylon shell features a PFAS-free DWR finish for added weather defense, while the silky taffeta liner ensures comfort after a long day on the trail. Designed for both warmth and functionality, the bag's contoured hood, full draft collar, and offset quilt construction work together to trap heat and prevent cold spots.