Inspired by high-performance, Z-Rated tires, this lightweight performance running shoe delivers sports car handling for your feet. No-Sew upper with light and flexible NanoWeb PU cast for breathable protection and support. Low-cut for mobility with a lightweight Bootie fit system for comfort. Light, low profile EVA designed with a radical new geometry for outstanding handling. CRTek high abrasion rubber in key wear areas for lighter durability. Z-Rated technology features a unique outsole geometry for control, traction and speed. Radically sliced geometrical sole mimics the tread of high-performance tires for ultimate ground contact for a more responsive ride. Wt. 9.0 oz.