The BOSU 65 cm Balance Trainer combines all the elements of fitness: cardiovascular, toning and flexibility into unique and highly effective combinations. Challenging and fun, the BOSU promotes moving with control, as you work out on an unstable, dynamic surface. FEATURES: BOSU 65 cm Balance Trainer for cardiovascular, toning, and flexibility training Smooth nonskid base allows for stability and BOSU training almost anywhere Dome side provides ever-changing surface for variety of BOSU balance workouts Maximum User Weight: 300 lbs Includes owner's manual and foot pump Manufacturer's Warranty: 90 days Model : 10850-2 BOSU For additional information relating to the Manufacturer's Warranty, please contact 1-800-810-6528.