Sea to Summit Ultra-Sil Dry Sack Material: Ultra-Sil (siliconized Cordura), PU coating Volume: 1 L, 2 L, 4 L, 8 L, 13 L, 20 L, 35 L Dimensions: (width x height) [1L] 6 x 9 in, [2L] 8 x 12 in, [4L] 9 x 15 in, (diameter x height) [8L] 6.5 x 18 in, [13L] 8.5 x 21 in, [20L] 10 x 24 in, [35L] 12 x 27 in Closure: Hypalon waterproof roll-top Waterproof: yes, fully taped seams