Specially designed with top athletes, the Action Camera Harness provides exceptional stability when paired with all USWE back packs with the 4-point Race Harness. M-XL sizing: approximately 84-120cm/33-47" in chest circumference. Compatible with all GoPro cameras. Not compatible with neck braces. Adaptors for cameras are not included with the harness.. Fits the following USWE packs: Airborne, Patriot, Vertical, Outlander, Ranger, XC, A2, A3, A4, F3, F4, F6, KC66.