Granite Gear, born in the Boundary Waters and tougher than granite Granite Gear was born among the placid network of wild waterways etched through the boreal forest that make up the Boundary Waters between Minnesota and Ontario. During a paddling trip through Quetico Provincial Park in 1986 Jeff Knight and Dan Cruikshank realized there was a need for better outdoor gear, planting the kernel that became Granite Gear.  From those humble beginnings—two buddies on a camping trip—Granite Gear has grown into an internationally respected brand that matches purpose with weight, comfort and durability. Their award-winning backpacks and accessories have gained a cultish following and have proven their mettle in the earth’s harshest environments, from Mount Everest to the North and South Poles, and to thousands of miles of everyday wear and tear. Jeff and Dan set out to make the best gear imaginable and they and Granite Gear’s team of product designers and engineers have accomplished it—with an ever expanding line of products ranging from stuff sacks, to ultralight packs, to ultra-durable packs that meet the demands of soldiers. Granite Gear’s gear is truly tougher than granite. eVent Sil Compression Sack The eVent Sil Compression DrySack allows you to maximize space inside your pack by reducing the packed size of bulky items like sleeping bags and clothes. The waterproof 30D Sil-Nylon Cordura construction is an incredible balance of strength and weight and an integrated roll-top closure further ensures complete protection. The eVent Sil Compression DrySack has a space-saving shape that purposely takes best advantage of the inner dimensions of a backpack. Not intended for submersion. Once you've sealed the roll-top closure, you can cinch down the drysack with ultra-lightweight LineLoc compression straps. An innovative eVent air-purging bottom allows excess air to escape without jeopardizing weather protection. All seams are taped with eVent to provide further confidence. Not intended for submersion. Size          Weight        Dimensions          Volume 10 Liters    2.8oz           5x7.25x20"            610ci                  78grams                                   10L 13 Liters    2.9oz           5.25x7.75x21"       800ci                  83grams                                   13L 18 Liters    3.4oz           6x8.75x22.5"         1100ci                  95grams                                   18L 25 Liters   3.8oz            7x10x25"               1525ci                  107grams                                  25L