The Edgar Sherman Design Sling” ESD Sling” was designed with purpose” research extreme testing” and experience. The ESD Sling is adaptable to the end-user. The ESD Sling is highly customizable to any rifle” sub-gun” shotgun” hunting rifle” bolt action” and PDW weapon system. There are two adjustment sections on the ESD sling. A rear adjustment section to fit the ESD sling to your body size and additional gear. And a quick-adjust section to loosen or tighten the sling while in use. The ESD Sling adjustment system is more adaptable to natural body movement and body mechanics. The 1-inch width of the ESD sling has less friction than wider slings and allows the ESD sling to move across your body without resistance.