Features:  1. Waterproof and tear-resistant fabric, waterproof (> 3000mm), which effectively protects your electric device, clothes, snacks, and other items from water, sand, and dirt.  2. After silicone oil treatment, the durability of water repellency is higher than that of traditional water repellent treatment.  3. 190T polyester taffeta, reliable and wear-resistant to provide a long time lasting protection of your stuff.  4. Pressing glue at a waterproof place to prevent water from infiltrating from a line position  5. Roll down to close the bag and leave it on the water to do other water sports, no worry about the items getting wet.  6. Durable plastic fasteners, not easy to break. Quick and convenient to use, easy to accept.  7. Suitable for river trekking, boating, rafting, kayaking, and beach leisure.    Specification:  Color: As the picture show  Material: 190T polyester taffeta  S size: (1.5L) 19.5 * 20 cm / 7.7 * 7.9 in  M size: (2.5L) 22.5 * 29 cm / 8.8 * 11.4 in  L size: (3.0L) 24 * 30 cm / 9.4 * 11.8 in  XL size: (3.5L) 24 * 36 cm / 9.4 * 14.1 in  XXL size: (5.0L) 25 * 37 cm / 9.8 * 14.5 in  XXXL size: (8.0L) 30 * 38.5 cm / 11.8 * 15.1 in