The ION SUP Core Hip Belt is a safety hip belt that can be combined with a standard SUP board leash. You simply wrap the leg loop of your SUP leash around the hip belt. The advantage of the hip strap over the attachment on the leg is that you can move freely on the board without the leash getting your feet in the way. When you train turns or paddle technical distances, this type of attachment is preferable to a leg leash. Another area of use is paddling in streaming water, as it can be difficult to move when swimming in the water, if the board is attached to your feet.