Orb EXTREME™     4.5″ Deep Tissue Massage Ball General Application:  4.5″ Diameter High density ball provides aggressive deep tissue massage to IT Band, Hamstring, Quadriceps, Calf and more Firmer, more prominent bumps than standard orb Multi-directional roll provides focused massage to target specific areas Made from non toxic, latex free closed cell EVA/Polyolefin foam Benefits of deep tissue massage: Reduces muscle fatigue and tightness Promotes flexibility Enhances performance