Light Engineered Mesh keeps weight at a minimum while providing a breathable, foot-friendly wrap; Multi-Density Midsole allows you to access two levels of cushioning: soft against the foot and firmer/more responsive against the ground; Roomy Toe Box - anatomical toe box allows toes to spread naturally and comfortably; ZipFoam Midsole offers lightweight cushioning with more rebound than traditional EVA; Stack Height: 33mm (heel) / 28mm (forefoot); Heel to Toe Drop: 5mm; Weight: 9.2oz (M9); Best for Road Running