Ultralight EVAmidsole foam for lightweight, durable cushioning.A-Boundis a recycled, environmentally friendly midsole compound for resilient underfoot protection.Guide Rails are incorporated into the A-Bound midsole for adaptive stability.StabiliPod have been increased in number to provide improved support through the three natural stability zones of the foot.Built-in Varus Stability Wedge is updated for a wider heel landing and offers support for overpronation without pushing up the arch like traditional stability devices.Natural Ride System (NRS)design includes a more natural, foot-shaped last, zero millimeter heel to toe drop, and metatarsal-specific shapes in the outsole to assist in proper foot mechanics and allow for more natural foot movement.Natural Foot Designfollows the natural shape of the foot for ultimate comfort. Blending reliable cushioning with mild support, the Altra Provision 3.0 is a zero drop trainer ideal for daily running.