New & Unworn Vivo Barefoot Primus Lite Bio II Moonstone Grey White Zero Drop Minimalist Size 40 PRIMUS LITE II BIO MADE FROM PLANTS FOR MINIMUM IMPACT ON YOUR BIOMECHANICS AND THE PLANET The Primus Lite II Bio, is our new plant-based performance shoe, made with over 30% natural plant-based materials. Our philosophy is simple, minimal shoes offer you less process and materials meaning you benefit from maximum connection between your feet and the ground. Less process equals less impact on the environment too.