Cap Barbell Adjustable Weighted Vest CONSTRUCTION - Made from reinforced nylon and polyester. Dimensions vary depending on size selected. COMFORT - Fully adjustable waist belt and padded shoulder straps allowing for a snug and secure fit. WEIGHT - Adjust total weight by removing or adding individual weight packets. Each packet is filled with 2.5 lb of iron ore fines. FLEXIBILITY - Ideal as additional resistance for any body weight training. Anchor hooks designed for parachute run training. Includes reflective stripes for easy visibility if used during walking or running. TRUST - Trust experience. CAP has been a pioneer in fitness with over 30 years experience and locations worldwide. Chances are if you have ever worked out, you have worked out with a CAP product. Good Afternoon,