The harness has a three-strap program each with a selected purpose. The Dynamic Bungee Strap gives overall flexibility for motion and respiration devoid of compromising the attract. The Static Buckle Strap tends to make for easy on/off while giving an anchor position to attract the pistol in opposition to. https://www.primmaryarmshop.com/product-tag/fn-510-accessories/?per_page=9&layout=list