The dry sacks are made with rip-stop polyester fabric and taped seams to ensure maximum waterproofness and durability, great choice for beach, camping, boating, canoeing, swimming, and other outdoor activities. Features: Made of rip-stop polyester fabric with taped seams inside, waterproof and long-lasting. Roll-top closure with buckles keep your valuables safe from water. Can be used to store towels, money, electronics, and other equipment. Can be folded into a compact size for easy storage and carrying. Perfect for beach, camping, boating, canoeing, swimming, and other outdoor activities. Specifications: Material: Polyester Capacity: 5L, 12L, 15L, 25L, 35L 5L: Flat size: 43.5 x 25.5cm / 17.1 x 10in Usage size: 35 x 15cm / 13.8 x 5.9in Weight: 40g / 1.4oz 12L: Flat size: 53 x 31cm / 20.9 x 12.2in Usage size: 45 x 20cm / 17.7 x 7.9in Weight: 55g / 1.9oz 15L: Flat size: 56 x 33.5cm / 22 x 13.2in Usage size: 48 x 22cm / 18.9 x 8.7in Weight: 59g / 2oz 25L: Flat size: 65 x 44cm / 25.6 x 17.3in Usage size: 53 x 28cm / 20.9 x 11in Weight: 75g / 2.6oz 35L: Flat size: 72 x 50cm / 28.3 x 19.7in Usage size: 64 x 32cm / 25.2 x 12.6in Weight: 93g / 3.3oz Package List: 5 x Dry Sack