As the name indicates, The Helix Leash by Retrospec is designed for paddleboards and is suitable for SUP surfing as well. It's super durable and wraps comfortably around your ankle.
Technical features
10' long when fully extended
Tight coil for reduced drag, designed to bring back your board in case you fall
Comfortable and long-lasting ankle strap with easy-to-use Velcro wrap closure