Reebok Premier Zigblaze Zigtech Mens Running Shoes White Synthetic ZigTech, one-of-a-kind zig-zag-shaped sole, absorbs the impact of heel strike and propels Lightweight Synthetic/mesh upper ensures comfort, fit and durability when you need it the Superior DMX Shear cushioning panels for added comfort and reduced heel stress. Forefoot flex grooves for added flexibility. Breathable nylon mesh to keep your feet cool.