The RS-7 is specially designed to work with BlackRapidís MODS system. It features attachment points so you can customize your strap with your choice of storage and other features. Itís constructed of ballistic nylon for extreme durability. With the RS-7, ergonomics are key. Itís designed and shaped to fit perfectly around your shoulder. The weight of your camera is evenly distributed for the ultimate in comfort. Built for speed, for when timing is everything.Rs-7 Strap with FastenR-3.