SealLine's lightest, most versatile dry bag, the Storm Sacks deliver waterproof protection anywhere you need it. Protect a camera or down bag in your backpack, or keep your manky laundry from fouling up the clean stuff while bike touring Laos the possibilities are endless. A roll top closure ensures a great seal, and durable 210D PU coated nylon provides lasting protection with taped seams and a white interior for added visibility. The 25L and 35L sizes are designed to accommodate a camp mattress or tent. Lightweight and Packable: Perfect for backpacking and hiking as well as paddling. Secure Closure: Roll top closure now features a stiffer top strap for a more secure seal. Watertight protection: Sewn and Taped 210D PU coated nylon PVC Free: Eco friendlier fabrics reduce environmental impact.