CFF Slam Ball - Medicine Ball - 40 lbs - Non-Bounce Slammer Why buy a CFF Slam Ball? CFF slam balls are made with more virgin rubber than our competition, making the shell of the ball more plyable, able to with stand years of punishment. The slam ball allows for exercises, ranges of motion, and movement speeds that one cannot obtain with traditional gym equipment like barbells, dumbbells, kettle bells, or machines One our most popular items with Personal Trainers, Crossfitters, & Sport Specific Trainers across the US. Gain speed, increases power & endurance, burn more calories than ever before! 40 lb Slam Ball