Marmot has taken their best-selling Trestles Elite Sleeping Bag series and made their most sustainable sleeping bags ever, without sacrificing up-mountain performance or durability. The Trestles Elite Eco 20 Sleeping Bag is an environmentally friendly update which features Marmot Upcycle® PFC-free and recycled shell, lining, and fill. The HL-ElixR™Eco Micro synthetic insulation uses a unique blend of three fibers for maximum warmth, soft handfeel, and high loft. Wave construction on top and a blanket construction on the bottom provide optimal warmth and comfort. An anatomically 3D footbox and a fold-down secondary zipper offer ventilation and easy access for this mummy sleeping bag. Marmot designed the Trestles Elite Series for treks where every ounce counts, so they kept the lightweight and easy compressibility of the original