Specifications: Color: Black Product weight: 12/16/20 lbs Material: 2.5 mm neoprene black iron sand Package includes: 1 x Weighted vest-Soft comfortable and breathable materials provide a comfortable experience-Black iron sand on the inside can enhance the effect of the exercise.-Two adjustable buckles can be adjusted according to the user's body shape-Reflective stripskeep users safe at night-Fine workmanship and tight stitching prevent sandleakage-Thick and wide shoulder straps distribute weight evenly across the shoulders-The back pocket can be used to store small items like cards keys and cell phones-Helps you increase exercise burn more calories and build muscle-Can be used while running climbing exercising or even walking-Ideal for all sports enthusiasts