Design: Breathable mesh upper promotes plenty of airflow to keep your feet comfortable Lace closure Weight: 7.9 oz Heel Drop: 10 mm In-Shoe Comfort: OrthoLite™ sockliner offers excellent moisture management New softer heel collar for a silky feel against your skin AmpliFoam™ midsole is engineered to maintain durability at softer densities, providing better flexibility, comfort, and platform adaptability ideal for natural running GUIDANCE LINE® midsole technology decouples the tooling along the line of progression for enhanced gait efficiency Ample cushioning from rearfoot GEL® technology Internal heel counter and synthetic fiber stitching on the overlays improve support and help to hold the foot in place Strategically located flex grooves in the outsole improve flexibility Durability & Traction: Rubber outsole and toe reinforcement provide better durability