The SealLine BlockerLite Compression Dry Sack is an ultralight, fully waterproof roll-top compression stuff sack for organizing, condensing, and packing contents in backpacks and duffels for trail and paddling adventures. Waterproof construction with a wrinkle-free roll-top closure ensure that sack contents are kept safe and dry. A continuous compression system encircles the sack to pack tighter and minimize seam strain, while a PurgeAir valve vents trapped air, helping the sack to compress further after being sealed. Fully welded seams provide unmatched strength and durability, compared to sewn-and-taped seams, and the 20-denier silicone and polyurethane-coated nylon delivers waterproof protection while barely tipping the scale. Unlike traditional, rounded stuff sacks, the SealLine BlockerLite Compression Dry Sack is shaped like a rectangle with flat sides that nestle closely together and pack 20 percent more efficiently, for space-saving organization. Available in three sizes and colors for building out the perfect packing system for backpacking, camping, boating, expeditions, and travel: 5-liter (305 cubic inches) measures 3.5 x 3.5 x 11.8 inches and weighs 2.8 ounces; 10-liter (620 cubic inches) measures 4.3 x 4.3 x 14.1 inches and weighs 3.4 ounces; 20-liter (1220 cubic inches) measures 5.5 x 5.5 x 18.8 inches and weighs 4.3 ounces. Manufacturer’s limited lifetime warranty. Made in the USA.