Yes4All 3KHB 18.1kg Slam Ball, Medicine Ball for Strength and Crossfit Workout - Fitness Exercise Ball with Grip Tread & Durable Rubber Shell (18.1kg, Black)

HIGH-DENSITY CONSTRUCTION: Filled with iron sand to prevent the ball from bouncing or rolling and enhance the balance and firmness of the ball EASY TO GRIP SURFACE: Feature a grooved and textured PVC shell to help you get a firm grip on the ball even with sweaty hands THICK SEAMLESS DESIGN: Specially formulated resilient soft shell which is rotationally molded for a seamless construction to add more durability and ensure it cannot be split over time of use BOOST YOUR AEROBIC CAPACITY: Improve muscle mass & burn more calories, enhance coordination between your hands & eyes for smooth movements in sports IDEAL FOR THE TOUGH WODS: Non bounce, specifically designed for exercises, conditioning workouts, wood chops, overhead throws, twists, MMA, wrestling, football, basketball, or general athletic training