This waterproof Dry Sack is ultralight and secure for your epic adventure. Designed with rounded base for convenient packing and Hypalon roll top closure. Fully waterproof coated fabric and seams. Material: 40D nylon. Sizes: 2 Liter: 13 cm x 29 cm / 5.1" x 11.5" (23 grams / 0.8 ounces). 8 Liter: 17 cm x 46 cm / 6.7" x 18" (30 grams / 1.1 ounces). 20 Liter: 25 cm x 61 cm / 10" x 24" (50 grams / 1.8 ounces).