WHY SHOULD YOU CHOOSE MOOCY BACKPACK CHEST STRAP? ✔Increase the stability of the backpack and reduce the pressure on your shoulders, neck and back. ✔Perfect for camping, hiking, jogging, travel use. Free your hands and enjoy your wonderful journey. ✔Made of high quality Nylon material, the length can be adjusted from 4" - 22", compatible with most sizes. ✔Easy to buckle & unbuckle the sternum straps with the quick release buckle design. ✔Suitable for handbags, luggage, totes, briefcases, carts, wheeled luggage and more. Step 1 First we will put the back of the backpack upward, and wrap the chest strap around the shoulder strap. Step 2 Insert each sternum strap into the corresponding shoulder strap and secure the strap in place. Step 3 Then adjust the length of the backpack chest strap through the tension lock. Step 4 Put on your backpack and buckle up your sternum strap, then adjust the length of the shoulder strap as needed.