The Pro Sling Strap features an innovative SpeedCinch pulley system, which is a two-part camera retrieval and locking mechanism. First, it allows you to quickly retrieve your camera from an adjustable and retractable strap across your body. Second, it allows you to lock your DSLR at your back, preventing your camera from swinging and bouncing around. To return to shooting, simply unlock your camera and draw it forward in an upward arc motion; the strap doubles in length as the smooth material allows you to bring it up to eye-level.