Strong during training, gentle on nature. The Primus Lite III is your perfect training partner. It gives your feet the space they need to move the way nature nature intended, and provides powerful support for every run, walk or workout. every run, walk or workout. Receive 50% off the VIVOHEALTH "Barefoot Fundamentals" course when you purchase the Primus Lite III. Add the "Barefoot Fundamentals" course to your cart and use the code VHCOURSE50 to redeem the offer.