Lightweight, heavy duty, 1000D water-resistent nylon Cordura. Attaches to your backpack shoulder strap, belt or any strap up to 3 inches using a patented Clakit Clip (included) | StrapPack provides a pouch with elastic retainer to safely carry a small UHF/VHF/800MHz radio or GPS on the front of your pack. | Gives you quick and easy access to your electronics and keeps them secure from theft. Fits most smallradio/GPS models up to 3”w x 2”d x 7”h (not including antenna). | Clip provides a secure, no-slip, no-bounce and comfortable fit. Tested to 120 mph and 25 pounds. Easy to install; simply wrap clip around shoulder strap and squeeze to lock. | Clip can be reused with any accessory that has a belt loop, belt clip or molle backing. It also works with GoPro or similar cameras (requires curved adaptor - not included)