The TriggerPoint GRID X Foam Roller is the firmest solution for targeting troubled areas. This foam roller is made of firm EVA foam that's specialized to target larger muscle groups. It features a three-dimensional surface that aerates while you roll plus promotes airflow and oxygen to repair the muscles. This roller is compact and travel-friendly so you can travel to all your sporting events with a massage therapist with you at all times. The TriggerPoint GRID X Foam Roller is the best solution for will aid in empowering you in your active lifestyle!