The BlackRapid RS DR-1 Double Strap (Black) is worn around the shoulders and is adjustable to fit most photographers. It will carry 2 cameras or lenses vertically at the side. The locking FastenR connects the straps to the tripod socket located on either the camera body or the lens. Once connected, the cameras hang upside down, resting securely at the side.
The difference between Black Rapid's DR-1 and DR-2 is that the DR-1 is for larger framed people while the DR-2 is for smaller framed people. The DR-2 is narrower across the shoulders.