Durable TPU construction with a non-slip surface for a secure grip and increased safety during use. Versatile compatibility with a wide range of surfboards and paddleboards, suitable for surfing and paddle sports at beaches, lakes, rivers, and other waters. Spiral-ring design provides good elasticity with flexible expansion and contraction, and the length can be adjusted to match your activities. End of the paddleboard ankle leash features a thick, soft ankle loop for enhanced comfort, with an adjustable Velcro closure to fit different ankle sizes. Use scenarios - Lake or calm-water paddling: adjust the length for a comfortable reach while keeping your board within reach if you fall off. - Beach surfing: the non-slip surface helps you maintain grip and keeps the leash securely attached as you move in and out of waves. - River paddling or mixed-water environments: length adjustability allows you to adapt to currents and varying paddling styles while maintaining control of your board.