BlackRapid Black Rapid Brad Camera Strap Underarm Stabilizer for Various Straps

BRAD...
A must have for photographers on the move, the BRAD (Black Rapid Arm Defense) MOD is designed to attach to your RS-7 for a more secure fit during those action packed shoots. Worn under the arm, the BRAD will make sure that your strap stays put, right where you like it. Also compatible with RS-1 through RS-5.