Lightweight Breathable Materials for a '2nd Skin' fit and feel; Roomy Toe Box allows toes to spread naturally and comfortably; Multi-Density Midsole allows to access 2 levels of cushioning: soft against the foot and firmer/more responsive against the ground; ZipFoam Midsole offers lightweight cushioning with more rebound than traditional EVA; Best for Daily Running, Walking; Stack Height: 32mm (Heel) / 27mm (Forefoot); Heel to Toe Drop: 5mm; Weight: 9.6 oz (M9)