These shoulder holsters have a full harness and tie downs for stability and comfort. A smooth nylon web harness lies flat under or over clothing and distributes weight evenly. It also has a four way adjustment for a perfect fit. The tough grade of nylon cover prevents chafing under arm. It's waterproof, closed cell foam padding won't absorb body moisture smooth nylon lining for easy drawing and holstering. It's molded thumb break and non-stretch retention strap are adjustable with velcro.