TriggerPoint Performance products are patented to mirror the feeling of a human hand and the effect of a deep tissue massage. These products are designed to facilitate a massage that penetrates the belly of the muscle hands-free without being too invasive or traumatic to the muscle tissue. The Grid Foam Roller is a revolutionary tool based on a grid system of varying widths and densities, known as Distrodensity. This allows you to take foam rolling to the next level by letting you control the intensity simply by repositioning The Grid. It is great for general use and core workouts.