Lightweight and breathable materials for a 2nd skin fit and feel; Recycled engineered mesh upper provides a soft and comfortable fit with optimal ventilation; OrthoLite Performance insoles with long-term resilience and anti-microbial properties; Roomy Toe Box allows toes to spread naturally and comfortably; Stack Height: 38 mm (heel) / 33 mm (forefoot); Heel to Toe Drop: 5mm; Weight: 7.9 oz (W7); Best for Road Running