DESCRIPTION: The GRID foam roller is for anybody who wants to move better. Use the GRID for a self-massage and roll through the tight muscles, knots, and kinks that prevent feeling good and moving well. The GRID 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 hands. Three-dimensional surface allows tissue to aerate while you roll, promoting the flow of blood and oxygen—the nutrients needed to repair muscles Hard, hollow core hand-wrapped in EVA foam makes it firmer than traditional foam rollers The environmental design uses less foam than traditional foam rollers Compact and travel-friendly Backed by a one-year warranty Weight tested to support up to 500 lbs/225 kg static load