Amazon has Triggerpoint GRID foam rollers on special today as one of its deals of the day. You can save up to 45% on these hollow core massage rollers, and prices start at just $24.75! these foam rollers have been used by massage therapists and physical therapists, and they’re very durable and versatile. Using TriggerPoint GRID foam rollers provides benefits such as decreased muscle and joint pain, increased circulation and flexibility, improved range-of-motion, better balance, and improved gait.