The Addaday Type C Massage Roller is the perfect training companion for runners who want pinpoint precision and ultimate versatility. Like the longer Addaday Pro Roller, the Type C uses massaging gears to knead deep into muscles and relieve nagging pains. The gears use two different densities to dial in the massage you need: Medium gray gears can relieve muscle fatigue and flush lactic acid A firm red gear targets hard-to-reach shin splints and Achilles pain The best-selling massage roller is small enough to throw in your luggage for those out-of-town races but powerful enough to work out whatever knot you’re dealing with.