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, weve 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, weve cued up smaller, tightly spaced lugs in center and larger, more aggressive lugs at the perimeter designed for improved traction on uneven terrain. Details: Best for Trail Running, All Terrain Running Extended heel pull Engineered mesh Compression molded EVA foam midsole Durabrasion rubber 4mm lugs Recycled poly laces The Challenger 7 features a higher bed of soft cushion, designed to provide a forgiving impact and ride. The Challenger 7 features a symmetrical bed of cushion without additional prescriptive technologies. Designed to provide the support you want and nothing you don't.