ProsourceFit Slam Medicine Balls 5, 10, 15, 20, 25, 30, 50lbs Smooth and Tread Textured Grip Dead Weight Balls for Strength and Conditioning Exercises, Cardio and Core WorkoutsTEXTURED GRIP A robust tire tread surface gives you a sturdy grip during intense workouts to prevent the heavy gym ball from slipping through your hands DURABLE A supple rubber shell absorbs impact and holds up through the toughest workouts so you can slam your way to a more fit body FULL BODY CONDITIONING From powerful throws to basics like squats & presses, weighted medicine balls help improve coordination, core strength & endurance NO BOUNCING Dead