This strap combines an elastic shock absorbing section with an adjustable static section for more power. The upper half of the 55mm Professional Dual Strap strap sits on your liner tongue and the lower half sits on your plastic cuff, providing a very seamless transition from leg to liner to boot. It also incorporates elastic shock absorbing layers that smoothen out choppy terrain and an outer static section that provides pure power and energy transmission. The outer static section is adjustable and allows you tofune tune the amount of suspension or responsiveness called for. The Redster version feaures a traditional, push-to-release cam buckle.