Outdoor Sleeping Bag, Camping Envelope Sleeping Bag, Adult Four-Season Travel Thickened Hollow-Fiber Winter Insulated Cold-Resistant Sleeping Bag, Navy Blue

When encountering light rain, surface water droplets will roll off like the lotus effect, and can be cleaned with a damp cloth. We recommend pairing it with a moisture-proof pad to enhance the warmth of your sleeping system by 30%. Structural optimization achieves a balance between weight and warmth. All inner seams are finished with flatlock stitching to prevent thread ends from directly touching the skin. • Lock-in warmth: This sleeping bag features high-quality hollow-core cotton filling. The fibers trap still air layers inside, effectively slowing heat loss. Compared to traditional cotton, hollow-core cotton maintains its loft even in damp conditions. • Envelope Expansion: The innovative envelope-style construction breaks free from the restrictive feel of traditional mummy sleeping bags, increasing legroom by 50%. • Multi-functional Adaptability: The inner layer features skin-friendly polyester fabric with superior moisture-wicking properties compared to regular cotton. Pair it with a fleece liner for winter warmth, or remove the liner in summer to transform it into a cooling sleeping bag. • Military-grade protection: The outer polyester fabric undergoes Teflon® water-repellent treatment to instantly block dew and moisture. Colorfastness is enhanced compared to traditional dyeing. Anti-tear fibers are incorporated into both warp and weft threads. • Comfortable Sleep: The hood section provides a three-dimensional fit that fully encloses the head, leaving only the mouth and nose exposed. The windproof collar at the shoulders features 3D pattern-making technology with a soft fleece lining.