Reebok Women's Zigtech Squared 2.0 Running Shoe Synthetic 3D FuseFrame upper for a light and breathable feel with new, multilayer design for style External, midfoot frame support for a locked-in fit and feel Full-length Zig platform for underfoot comfort and improved energy return Interactive underfoot design for lightweight, smooth transitions CRTek high abrasion outsole rubber in high wear areas for targeted protection