A leash should be at least as long as your board. For inflatables a coiled leash is best and we include these with many of our iSUP packages. For all-round and surf SUPs leashes are generally straight and he same rules apply. If you surf with a shorter than recommended leash this can end badly with fins to the face so don’t scrimp and buy the correct length. For raceboards some are using coiled leashes for less drag and in white water many are choosing to use no leash although you do risk losing your board down stream!