Hoka One One Built at the intersection of road and trail, the new Challenger 7 has been completely reimagined from the ground up. Combining a simplified mesh upper with a soft new foam, we've increased the stack height for a plusher feel and added proprietary rubber to the bottom unit, along with a reimagined outsole design for the best all-terrain ride yet. Inspired by gravel tires, we've cued up smaller, tightly spaced lugs in center and larger, more aggressive lugs at the perimeter designed for improved traction on uneven terrain. Best for trail running, all terrain running. A trail-tested and street-approved pair of running shoes, the Hoka One One® Challenger Atr 7 provides soft cushioning, stability, and lightweight performance to your feet during any activity. Engineered mesh textile upper. Breathable textile lining. Removable textile insole with soft and even cushioning for all-day comfort. Lace-up construction for a snug fit. Round toe silhouette. Padded tongue and collar for added comfort. Extended heel pull for easy entry. CMEVA (Compression Molded EVA) midsole delivers lightweight, durable, responsive cushioning. Durabrasion rubber outsole for superior traction and flexibility on any surface.