We’ve taken our best-selling Trestles Elite Sleeping Bags and made them our most sustainable sleeping bags ever, without sacrificing mountain performance or durability. The Trestles Elite Eco 15 Sleeping Bag features 100% recycled fill, shell, and lining. 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. Plus, we designed the Trestles Elite series for treks where every ounce counts, so we kept the lightweight and easy compressibility of the original. EN rated as comfortable for men to the lower limit of approximately 15°F and a comfort rating for women of approximately 27.3°F.