The Trigger Point Grid Vibe Plus Foam Roller with 4  built-in vibration frequencies to step up your recovery with a relaxing deep tissue massage. The Grid surface provides a 3-density system which mimics a massage therapist's hands and allows you to target specific muscle groups like your IT Band, quads, calves or any other muscle group that is troubling you. With a compact design and 2 hours of battery life, you can easily take it with you for a post-run recovery session.