Made for larger bodies, the GRID 2.0 foam roller features a hollow core and designed with a patented multi-density foam surface to deliver firm compression on tight muscles, knots, and kinks. Proprietary Distrodensity zones replicate the feeling of a massage therapist’s hands to help promote blood flow and oxygen. Features & Specs Three-dimensional surface allows tissue to aerate while you roll, promoting the flow of blood and oxygen—the nutrients needed to repair muscles Proprietary Distrodensity zones replicate the feeling of a massage therapist’s hands Hard, hollow core hand-wrapped in EVA foam makes it firmer than traditional foam rollers 26" length can accommodate larger bodies or offer a more stable surface 5.5 in wide x 26 in height x 5.5 in depth Environmental design uses less foam than traditional foam rollers Weight tested to support up to 500 lbs. Can help with Achilles tendonitis, DOMS (Delayed Onset Soreness), forearm / bicep tendonitis, IT band syndrome, neck pain, piriformis syndrome, runner's knee, sciatica, shin splints Works on hips and glutes, lower legs, neck and shoulders, upper back and chest, middle back, upper legs, arms