j/fit Dead Weight Slam Ball &ndash; Strength & Conditioning Cross Training WODs &ndash; Plyometric & Core Training, Cardio Workouts For Muscle Build, Balance &ndash; Ideal For Squats, Lunges, Wall Slam Exercises TAKE YOUR WODS TO THE NEXT LEVEL: Cross training is founded on innovation and variety  and our slam ball helps you reap all of its benefits, with unprecedented ease. Repetitive motions during WODs, through continuously using barbells, dumbbells or kettle bells soon tire your muscles and keep your from extending your range of motion. By purchasing the j/fit Slam Ball, you can transform your WODs and quickly advance cross training levels, quickly. BOOST YOUR AEROBIC CAPACITY: Slam ball workouts tone the cardiovascular system, enhance full-body circulation and dramatically improve your strength and endurance. By moving at a high speed, you push your body towards producing more power  and FAST. As the anaerobic system is working at full steam, aerobic functions pick up pace and are rendered even more efficient at providing in-between set & WOD recovery. BUILD MUSCLE MASS & ATTAIN PERFECT BALANCE: Theres only so much you can do unassisted, while cross training. Slam balls stimulate a host of muscle groups, simultaneously, which would otherwise need to be conditioned through separate, often taxing exercise sets. Slam balls add a layer of resistance to exercises which traditionally rely solely on bodyweight. They naturally increase muscle mass and improve posture and balance, through aiding in regulating and perfecting movement patterns. ENGINEERED FOR PRECISION & DURABILITY: Simply the highest quality slam balls on the market. Our slam balls have gone through over 10 re-designs throughout the years, aiming for perfection and exercise precision. Each ball is subjected to rigorous roll tests to ensure even weight distribution. Designed to withstand even the toughest of WODs, both indoors and outdoors, they are a wise, long-term investment for dedicated cross trainers. CHOOSE YOUR SIZE: Our 9" diameter balls are offered in 10-lb, 15-lb, 20-lb, 25 lb, 30 lb, 35 lb, 40 lb and 50 lb sizes. Get one now according to your strength level and come back to buy more, as your endurance increases! Purchase now -- the Best Slam Ball on the Market!