The TriggerPoint™ GRID® Foam Roller is the original hollow core foam roller. Featuring a patented multi-density foam surface, the massage roller delivers firm compression on tight muscles, knots, and kinks. The proprietary Distrodensity zones of the roller replicate the feeling of a massage therapist’s hands, which promote the flow of blood and oxygen – the key nutrients needed to repair muscles. Ideal for beginners to advanced rollers, the GRID Foam Roller releases muscle pain and tightness, improves mobility, and increases circulation – helping you feel better and move better.