Hit the trail with comfort and confidence in these great runners. Lightweight and breathable sandwich mesh upper with synthetic overlays for added support. Durable synthetic toe overlay protects your toes from trail debris. Midsole consists of: Max Air unit provides under heel cushioning and is also protected from the elements with a PU cage. Phylon forefoot allows you to stay mobile on rough terrain. Midfoot TPU shank provides support under the midfoot and medial arch. Outsole consists of: BRS 1000 carbon rubber under the heel for durability in high wear areas. Sticky rubber on the forefoot with a Waffle Fill pattern for traction and flexibility.