The Kirk Enterprises SS-1 Security Strap (Black) is a heavy-duty, padded, fully adjustable nylon strap with shoulder pad. It uses an Arca-Swiss style quick-release plate to attach a lens that's on a camera or a lens alone to the strap. The SS-1 provides a safe and convenient way to carry a second camera or telephoto lens.
To shorten length of strap, hold bottom side of looped strap, grasp buckle and pull to desired length. To lengthen, hold strap above buckle, grasp buckle and pull. When finished, grasp buckle and pull short end of strap, making sure it's taught in buckle.