Prevent the Cold A windproof, waterproof sleeping bag designed to keep you warm, comfortable, and portable in cold conditions. Construction and features are optimized for insulation, easy maintenance, and flexible use. Key benefits Reliable warmth: Tested temperature ranges by fill weight let you choose the right level of insulation for your needs. Weather protection: Nylon outer shell resists wind and light rain while the cotton filling provides soft, breathable insulation. Easy maintenance and durability: Outer fabric is wipeable and machine washable and built for wear resistance to ensure long service life. Comfortable and adjustable fit: Elastic drawstring hood, twoway metal side zipper, and adjustable foot zipper help control ventilation and sleeping position. Versatile configuration: Two sleeping bags can be zipped together to form a double sleeping arrangement, suitable for couples. Materials and construction Outer fabric: Nylon for wind and water resistance. Filling: Cotton for insulation and comfort. Zippers: Twoway metal zippers for reliable operation. Hood: Elastic drawstring at the head for a secure, adjustable fit. Performance by fill weight 400G: 8C to 20C / 46.4F to 68F 600G: 5C to 15C / 41F to 59F 800G: 1C to 10C / 33.8F to 50F 1000G: 2C to 5C / 28.4F to 41F 1200G: 6C to 0C / 21.2F to 32F 1500G: 11C to 5C / 12.2F to 23F Practical features Twoway side zipper allows partial opening for ventilation or full access for easy entry and exit. Foot zipper adjustment reduces stuffiness and enables more relaxed sleeping positions. Can be joined with a second sleeping bag of the same design to create a shared sleeping surface. Typical use scenarios Camping and backpacking in spring, autumn, and winter: Choose the fill weight that matches expected nighttime temperatures. Outdoor events and stargazing: Stay warm while seated or reclining outdoors without bulky clothing layers. Travel and emergency preparedness: Compact and portable option for coldweather stays, vehicle emergencies, or temporary overnight arrangements. Choose the fill weight that matches the temperature range you expect to encounter to ensure suitable warmth and comfort.