Pearl iZUMi Women's Tri Fly IV Carbon Cycling Shoe 100% Synthetic and Mesh Imported Synthetic sole Heel measures approximately 0.75" 1:1 Power Plate Nylon and Composite Fiber for lightweight stiffness and durability Direct-Vent technology Concave shape for low 7mm stack height Longitudinal arch support EVA foam and rubber heel bumper With its triathlon-specific upper, off-bike comfort, and ample ventilation and drainage, this sleek cycling shoe maintains a powerful, dry environment.