Easton Dry Sack 70D Nylon SiPU with taped seams Non wicking roll top Semi-transparent to see contents SiPU coating for waterproof durability Weight: 1L: 1.3oz; 2L: 1.6oz; 4L: 2oz; 8L: 2.8oz; 15L: 3.4oz; 20L: 4.7oz