Features: Engineered knit upper Improves breathability. Redesigned external heel counter Helps keep the foot stable and provide a more comfortable stride. LITETRUSS™ technology Improves medial support and midfoot integrity. 3D SPACE CONSTRUCTION™ feature Improves compression at footstrike. Rearfoot GEL™ technology cushioning Provides good shock absorption. FF BLAST™ PLUS cushioning Provides lightweight impact absorption and a responsive rebound. OrthoLite™ X-55 sockliner Improves comfort. Reflective details Improve visibility. AHARPLUS™ heel plug Improves the outsole durability. Specs: Surface Road Heel Drop 10 mm Weight 270 g/9.5 oz Support Neutral, Stability Cushion Max