1. Keeps Shoulder Straps Securely in Place .That gives your hand free.;2. Compatible with most backpacks with removable/adjustable shoulder straps up to 10 cm/4 wide (Approx) - Extends to Approximately 16 in length;3. Manufactured from rot resistant 38 mm (1.5 inch)polypropylene webbing;4. One buckle ,two slides, two web dominators - Black;5. If it is too long for you , please cut it and reseal ends with flame