Xvest X2 Vest 12-Pound Weight Vest (One Size Fits All) A one-size fits all strapping configuration Individual weight pockets give you complete control and stability of the weight Adjustable shoulder straps with hook and loop closures The two-piece clamshell design of the Xvest is based on orthopedic devices Warranty on the X2 Vest is for one year on the manufacture defects