1. Material: Non-toxic rubber ;

2. Inflatable;

3. Size:  2lb,4lb,6lb,8lb,10lb,12lb,14lb,16lb,18lb,20lb.or in 1kg,2kg,3kg,6kg,8kg,9kg,10kg.

4. Soft surface;

5. Weight marked;

5. Ideal for rotational movements, core exercises of many types and dynamic strength training.