The GRID 1.0 is twice as long as the GRID to accommodate larger bodies or offer a more stable surfaceUse the GRID 1.0 for a self-massage and roll through the tight muscles, knots and kinks that prevent feeling good and moving wellThe GRID 1.0 foam roller is designed with proprietary Distrodensity zones. This three-dimensional surface has a variety of widths to replicate the feeling of a massage therapist’s handsThree-dimensional surface allows tissue to aerate while you roll, promoting the flow of blood and oxygen—the nutrients needed to repair musclesHard, hollow core hand-wrapped in EVA foam makes it firmer than traditional foam rollersEnvironmental design uses less foam than traditional foam rollersLong length to accommodate larger bodiesWeight tested to support up to 500 lbs/225 kg static load