High Tensile Over-Braided Nylon Cord Thinner, lighter & stronger. Limited over-stretch designed to return to original length. Reduces tangling and drag. Precision Engineered Cuff Silicone Grip Print - Reduces slipping around ankle. 3MM Neoprene Padding - Thin, light and comfortable. Low Profile Moulded Velcro - Stronger & more reliable. Lightweight Moulded Pull Tab Ergonomic, quick release. Composite Horn Foam filled, light and shock absorbing. Extended horn length to reduce tangling. Streamlines Railsaver Less drag, thinner & lighter. Better Hydrodynamics.