As endurance athletes ourselves, we understand the need to train hard. Recovery is critical to an athlete's ultimate performance. That's why we developed the SMACKer - x-celerated muscle recovery for serious athletes. Consistent, daily use of our product will help keep leg muscles fresh, relaxed, and ready to perform at peak levels. Our products are 100% made in the USA, patented, and carry a lifetime warranty. And, if that's not enough, we've got an extensive list of professional and semi-professional sponsored athletes, sports teams (including NFL & NCAA teams), and military branches - with the results to prove it!