In the sun or in the rain. From asphalt to peaks. Designed to bring the road and trail together, the Challenger 7 GTX has been completely redesigned. Combining a streamlined mesh upper with new soft foam, the sole height has been increased for a more comfortable feel. GORE-TEX INVISIBLE FIT technology made from recycled material provides better protection in bad weather. Inspired by gravel tires, we placed smaller, closely spaced lugs in the center, and larger, sharper lugs on the perimeter, to improve grip on rough terrain.