YYST ONE Nylon Webbing Sternum Strap Backpack Chest Harness for 1" Webbing, NOT for 3/4 Inch Webbing This is a New- Style sternum strap, which is wider than the old style. Fit 25MM webbing - Suit most backpack shoulder strap with 25 mm (1 inch)polypropylene webbing, not suitable for 20MM webbing (3/4 inch) Tough Material - Manufactured from sturdy webbing and buckle. Keeps Shoulder Straps Securely in Place to free your hand . Adjustable - It is adjustable. you can adjust it to your expected length. One Dominator - One web dominators tie down the webbing to make sure they don't hang loose.