comfortable design; ergonomically correct; distributes camera weight evenly front and rear spring-loaded cam locks secure camera when not shooting shoulder pad made of 500D nylon, PU foam, and poly air mesh adjustable nylon webbing, sling extendable up to 60 weighs 4.32 oz CR-3 ConnectR Locking Swivel Carabiner; LockStar; FR-5 FastenR; Camera Safety Tether