The new Provision 8 has the same medial GuideRail™ technology you've always relied on, but only when you need it. Stoke your road running confidence with an inherently stable ride and Altra EGO™ midsole foam, made to deliver the ultimate responsiveness and comfort. Altra's Natural Fit will keep you moving the way you were designed to. The new Provision 8 offers a roomy toe box, secure midfoot, and zero drop. A refined molded heel collar ensures a secure fit while a new engineered mesh upper offers a sleek yet breathable design. It's time to fine tune your performance in comfort and style, with the subtle support you've been craving.