1.Size: 5kg, 10kg 15kg 20kg , or 20lb,30lb,40lb
2. Material:  Nylon Oxford

3.Sand bag with different fillings included

 (1). Iron clay (most expensive)    (2). Iron piece (more expensive)   (3). Iron sand(cheapest)

4. Fit all body size, unisex

5. Package: 1pc per poly bag or 1pc per colored box

6. weights conform to your body's shape, providing the most comfortable fit possible