66FIT PEANUT KNOBBLY MASSAGE BALL/ROLLERThe 66fit knobbly massage roller is a robust therapeutic roller which adapts to the body individual contours during use to boost circulation, relax muscles and provide relief from tension. Raised dimples penetrate deep into tired aching muscles to effectively stimulate blood flow and reduce muscular pain and discomfort providing relief to the neck, shoulders, arms, back, glutes, IT bands, legs and feet.