From the ground up, the new Challenger ATR 7 has been totally redesigned. For the finest all-terrain ride yet, we've combined a simpler mesh top with a soft new foam, raised the stack height for a plusher feel, added unique rubber to the bottom unit, and reinvented the outsole design. Breathable open engineered mesh upper with seamless synthetic overlays. Breathable textile lining for abrasion-free wear. Removable, foam padded insole for cushioning and support. Durable full-length EVA foam midsole to absorb shock and offer stability. Durabrasion rubber outsole with 4mm stepped rubber lugs for grip.