Sand Clothing, SUTEN Max Loading 20kg Adjustable Vest with Weight Jacket Boxing Training Exercise Vest Invisible Weight loading Sand Clothing (empty) Made of high density thickening oxford fabric, wear resistant. Designed with shoulder extension, comfortable to wear. Highly flexible compressed sponge interlining, for the protection and shock absorption. 16 pcs bags for sand loading or steel plate (not included). It is an ideal equipment for physical fitness, weight loss and exercise agile.