Features: 1. The sand anchor for use with personal watercraft, kayaks, rafts, floats and paddle boards. It can also be used as a 10L/20L waterproof dry bag, keeping your clothes, devices and personal effects safe and dry 2. Made of PVC material, waterproof, durable and long lasting. 3. Our design minimizes any potential for damage to your Kayak. Unlike traditional anchors, our sand anchor packs down small light making it perfect for paddle boarding and long-distance expeditions. 4. Easy to use. Simply fill with sand or pebbles, push any air out, roll the top down 3-4 times and clip closed. 5. Suitable for use in salt water, fresh water, or swimming pools to keep your PWC or inflatable float in place. We39;ve also added a handy bottom strap to make emptying your sand anchor underwater nice and simple. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: PVC Specification: 10L/20L Package List: 1 X Sand Anchor