RUMBLE ROLLERS are innovative massage tools designed to effectively decrease pain and alter the muscle length-tension relationship. Like the trained fingers of a massage therapist, RUMBLE ROLLERS penetrate deep into the muscle layers to target hard-to-reach knots. They work faster than other rollers on the market by kneading and stretching in multiple directions to shorten rolling time. And RUMBLE ROLLERS also target difficult-to-reach areas around the bones. They’re water and sweat-proof, tear resistant, maintain their shape for life and have lifetime warranty. Choose from three different rollers including the ORIGINAL RUMBLE ROLLER, FIRM BEASTIE BALL and GATOR RUMBLE ROLLER to target specific areas with ease.