The RAGE Slam Ball continues to be one of the most durable slam balls on the market today. Encased in an ultra-durable, heavy-duty rubber shell, the RAGE Slam Ball is high endurance impact approved and performs in ways a medicine ball cannot. Its textured surface allows for a high quality grip even when wet, while its black exterior keeps it looking clean and scuff free. Each slam ball comes equipped with an air valve making it possible to adjust the air capacity and overall firmness, customizing your slam ball to fit your workout. While its no bounce design proves to be ideal for various throwing and slamming routines. RAGE Fitness is built on sweat, passion, sacrifice and some of the strongest, most durable functional fitness equipment on the planet. RAGE (r�j) is all about explosive force, furious intensity and burning desire, and the products we offer prove it every day. We fuel the passion and intensity (a.k.a. the RAGE) for people who lift, jump, push, kick, run, climb, catch, twist, flip, resist, sweat and recover, and then do it all over again to push their athletic limits, reach their goals and improve their lives. The brand was born in 2008, but it didn't take long for RAGE to spread to gyms, boxes, garages and fitness clubs across the country and around the world. RAGE erupted into retail in 2012 and since then has become the definitive, authentic and accessible functional fitness brand in sporting goods and fitness specialty.