HOKA ONE ONE Women's Clifton 2 100% fabric Synthetic sole Shaft measures approximately 3.5" from arch Lightweight Breathable Air Mesh Upper - Allows air to fully permeate the shoe, promoting a cooler, drier and altogether more pleasant environment. Structural No Sew SpeedFrame Overlays - Provide necessary stabilisation around the midfoot from medial to lateral with a seamless interior environment that reduces irritation and blistering. Comfort Collar - Extensve padded pannelling prevent the foot from rubbing against the collar, thereby reducing blisters. Super Soft and Lightweight EVA Strobel Board Lasting - A robust, lightweight construction cushions and supports the foot superbly. Early Stage Meta-Rocker Geometry - specifically engineered with a low heel-toe differential and a sculpted outsole radius in the heel and toe, encourages a guided foot gait cycle; supports a runner's form and running mechanics.