Addaday Flexible Deep Tissue Shoulder Muscle Massage Roller, Boomerang Model, 40 Inches RECOVER FASTER, TRAIN HARDER: The Boomerang Massager contours around the body to massage the muscle fibers, tendons, and ligaments in your body for increased flexibility and lactic acid removal to achieve optimal athletic performance ACTIVE PAIN RELIEF: This medium density massager combines Surface Skin Technology and harder densities to prevent soreness and serious injuries  ideal for runners, bikers and triathletes who need to massage hard to reach areas like the back or shoulders GET YOUR BLOOD FLOWING: To redefine your recovery experience, use the Boomerang Massager to fuel your muscles with fresh circulation that carries the proper nutrients for rapid muscle growth and repair A MORE FLEXIBLE YOU: Perfect for your yoga warm up or post-run cool down, this massager alleviates knots, tension, and tightness to improve flexibility, so you can train harder than ever before GET BACK IN THE GAME: The Boomerang Massager wont let muscle soreness limit your success - keep at home, or to throw in the gym bag to take care of tired muscles on the go