These ultralight Ultra-Sil Sea to Summit dry sacks are great for keeping your gear dry without weighing down your pack.Specifications: Fabric: Siliconized fabric for durability30D Ultra-Sil Cordura nylonHypalon roll top closureSize: 1 L Dimensions: 4.3 in. x 9.4 in.Weight: 0.7 ozSize: 2 L Dimensions: 5.1 in. x 11.4 in.Weight: 0.8 ozSize: 4 L Dimensions: 5.9 in. x 13 in.Weight: 0.9 ozSize: 8 L Dimensions: 6.7 in. x 18.1 in.Weight: 1 ozSize: 13 L Dimensions: 8.7 in. x 20.9 in.Weight: 1.4 ozSize: 20 L Dimensions: 9.8 in. x 24 in.Weight: 1.8 ozSize: 35 L Dimensions: 11.8 in. x 27.6 in.Weight: 2.3 oz