Unigear Surfboard Leash, Premium and Straight Surf Leash for Safer and Unbounded Surfing with Waterproof Phone Case, 6 feet. This leash ties to your surfboard quickly and easily.

A tough surfboard leash that's capable of handling the heaviest surfboard and won't kink: The Unigear surfboard leash is made of seven-millimeter TPU and double stainless steel swivels, so it's durable and won't kink. Flexible and lightweight.

It comes with a water-resistant smartphone case, which fits smartphones up to 6 inches. Your phone will stay dry and safe. The belt is adjustable and fits the waist, shoulders, or neck.