Recycled engineered mesh upper provides a breathable, lightweight fit; Ortholite insoles with long-term resilience and anti-microbial properties; ZipFoam midsole offers lightweight cushioning with more rebound than traditional EVA; Roomy toe box allows toes to spread naturally and comfortably; Stack Height: 25mm; Heel to Toe Drop: 0mm; Weight: 8.7oz (M9); Best for Road Running