Extreme Cold Weather Sleeping Bag: Rated to -20°F, designed for winter camping, cold-weather backpacking, and harsh outdoor conditions. TechLoft Silver Insulation: High-performance synthetic insulation delivers excellent warmth retention, durability, and reliable loft in freezing temperatures. Mummy-Style Heat Efficiency: Tapered mummy shape minimizes heat loss while maintaining comfort and thermal efficiency. Draft Collar & Zipper Baffle: Integrated chest baffle and full-length zipper baffle help seal in warmth and block cold air. Durable & Travel-Ready: Water-resistant polyester shell withstands moisture and abrasion; includes stuff sack for easy transport and storage.