When racing on a longboard, Kona, or Formula board - you want to be able to easily adjust your harness lines with just one hand, while you are hooked in. These Ion Race Harness Lines allow you to do just that. The beefy velcro and webbing attachment points stay right where you put them on the boom. The clamcleat keeps the harness lines the length you set, even when hanging in them with all your weight. Durable plastic tubing protects the lines, these are designed so that the line is replaceable. Adjusts from 28" to 38" in length with the supplied line.