Meet the OG foam roller. This is the long version of the original hollow core roller. The 26” length offers a more stable surface while rolling out. The GRID®features a patented multi-density foam surface that delivers firm compression like a sports massage while channeling blood and oxygen needed to repair muscles. The GRID® Foam Roller is the 'go-to' roller to release muscle pain and tightness, improve mobility, increase circulation, and is recommended by sports doctors, chiropractors, and physical therapists.