Dig deep into those tight muscles with the Addaday Marble Roller. The three-marble design rolls easily over your neck, arms and legs while working deep into the muscle to untie knots and encourage circulation. Small enough to fit in your backpack or carry-on luggage, the Marble Roller is perfect for loosening up when you're on the go. Plus, it's designed for easy, one-handed use so you can roll out your calves or neck on the flight to your race. Need more coverage? The Addaday Pro Roller and Addaday Boomerang massager will get relief to those hard-to-reach places.