Our most versatile, feature-laden packing system sack, the Blocker Compression Dry Sack saves space on paddling and trail adventures, while the waterproof valve rapidly vents trapped air to ease compression-all this with fully waterproof construction ensures essential contents are protected, condensed and organized. FEATURES of the SealLine Blocker Compression Dry Sack Pack Lightweight 70D polyurethanecoated nylon materials are a tougher Resilient cousin to the ultralight BlockerLite materials Durable and versatile Materials are great for all-around use with confident water defense Fully welded seams result in stronger and more durably protective construction compared to sewn-and-taped seams Packing system sacks feature flat-sided Rectangular shapes that nestle closely together Packing 20% more efficiently than rounded sacks for easy Space-saving organization Materials have a reduced environmental impact over vinylcoated materials Unlike conventional systems that pull against seams Continuous Compression system encircles Sack to minimize seam strain, maximizing durability for dependable protection Waterproof, air-purging valve helps the sack compress further once it&';s been sealed Roll-top closure features a wrinkle-free stiffening strip to ensure a secure seal when closing the dry sack Product Specifications Features: Wrinkle-resistant, Compression, Waterproof, Roll Top Dimensions (5L): (W x L x H) 3.5 x 6.4 x 11.8 in. Dimensions (10L): (W x L x H) 4.3 x 8.2 x 14.1 in. Dimensions (20L): (W x L x H) 5.5 x 10.4 x 18.8 in. Weight (5L): 3.3 oz Weight (10L): 4 oz Weight (20L): 6 oz Best Use: Paddling, Backpacking, Camping Stuff / Compression Sack Closure: Roll-top Disclaimer: We only ship this brand to US Addresses.