If you already own a waist belt or a harness and don't want to buy a complete wing leash, then this is for you,  The leash is designed to take the shock out of the wing when it departs the riders grip, as the stretch helps it to disipate it's energy. They are available in two sizes and comes with a Carabiner for quick attachment. 

Sizes:  Small 1.4m or  Large 1.7m (before being stretched!)