Jinsen Grid Foam Roller For Massages, Soothes, Refreshes And Invigorates ( Black ) Designed To Be Your Own Personal Massage Therappist :Dual Pressure Zones let YOU control the pressure and action. Provides muscle soreness relief where you need it most including all key areas such as Lower and Upper Back, Neck, Knee, ITB, Quads, Hamstrings, Delts, and Shoulders Perfect For Self Myofascial Release For All Sports: Crossfit, Pilates, Bodybuilding, Rugby, Boxing, Running, Weight Training, Yoga and Sports Beginners Lightweight And Portable: Only 13.5 inches in length ensures it fits easily into any gym bag or travel case- ensuring you get your massage in any time, anywhere The design incorporates both low and high density foam for use on a wide variety of muscles