GYMENIST Rubber Medicine Ball with Textured Grip, Available in 9 Sizes, 2-20 LB, Weighted Fitness Balls,Improves Balance and Flexibility - Great for Gym, Exercise, Workouts GYMENIST Medicine Ball is available in 9 sizes to provide a challenge at whichever level you might be. Start with 2 LB for lighter workout and work you way up all the way to 20 LB for maximum challenge. Dual Texture provides secure, non slip grip. Designed for use without worrying of losing your grip. Constructed of highly durable rubber material to withstand pressure of bouncing off hard surfaces. Suitable for gym use or when working out in your own home. Great for multiple exercises including bodybuilding, yoga, aerobics or any other workout. Each size comes in a different unique color. Choose the one that's right for you or try them all.