1. ABOUT ZINZ BAG SHOULDER STRAP: ZINZ universal bag strap replacement can replace all broken straps of ANY BAG WITH D-RINGS OR EQUIVALENT HARDWARE. Especially for shoulder bag / laptop computer bag / briefcase / messenger bag / duffel bag / diaper bag / tool bag / guitar bag. Professional package, 24hrs after-sale service, 30-DAY MONEY-BACK for ZINZ Shoulder Strap. | 2. ADJUSTABLE STRAP in BOTH SIDE: Nylon material with dual balanced buckles, adjustable length from 43" to 79" (110 to 200 cm), suitable for people whose height is between 1.5 meters and 2.3 meters. | 3. TWIST-LOCK-HOOKS: High quality aluminum alloy material is more solid and hard, enough for the weight of 18kg; the hooks opening is larger than other regular straps, 360 rotation, easier to hang on D-ring or equivalent hardware. | 4. FIXED SHOULDER PADS: Soft breathable cloth, do not worry about pad slipping and hurt your shoulder by heavy bag; Fixed shoulder pad, KEEP THE PAD ON YOUR SHOULDER ALL THE TIME, let you walk without influence from slipping pad. and THE BELT IS SUPER SOFT, you will be still feel comfortable even in touch your skin directly. | 5. DUAL BALANCED BUCKLE: Double balanced clasps, let shoulder force more even, MAKE BAGS FEEL 50% LIGHTER; With non-slip design, the DUAL CLASPS ARE STABLE and will not change the length of the shoulder strap on its own due to the weight change of the bag.