This is a serious piece of gear – a military-style modular bivy sack (or \Biwaksack\) designed to protect your sleeping bag from the elements. It's brand new with tags still attached. Made from durable polyester that's waterproof, breathable, dirt-resistant, and even reversible. It's a large size, measuring about 225 cm long and 85 cm wide, perfect for a standard mummy-style sleeping bag for one person. Designed for all-season use and is suitable for camping, hiking, or military field use. Features include breathable fabric to prevent condensation, a right-side zipper, and a compact design. Brand is military surplus/style, and it's unisex for men or women. The model is a modular sleeping bag cover. No specific MPN. This bivy sack adds a crucial layer of waterproof and windproof protection, keeping your sleeping bag dry and clean in harsh outdoor conditions. Ideal for backpackers, preppers, or anyone who needs reliable shelter on the go.