TriggerPoint GRID Caps transform any of the TriggerPoint hollow core foam rollers into a gym bag. GRID Caps include easy-to-open caps to create storage inside the roller itself, tightly securing all your gym necessities. Durable strap makes hollow core foam rollers easy to carry and adjusts to fit comfortably over the shoulder. Designed to fit TriggerPoint's hollow core foam rollers including GRID, GRID 2.0, GRIDX, CHARGE, and CARBON. Use only with TriggerPoint hollow core foam rollers. TriggerPoint empowers people of all lifestyles to move and feel better. TriggerPoint designs and develops innovative massage therapy tools that mimic the touch of a therapist’s hands - making their foam rollers, hand rollers, massage sticks and balls ideal for individuals of all ages, sizes, and athletic ability.