Pearl Izumi Men's Elite Road v5 Cycling-Footwear Synthetic/ Textile Imported Synthetic sole Shaft measures approximately low-top from arch Spring/Summer 2017 Unibody construction eliminates traditional lasting board to deliver super low 5mm stack height for maximum pedaling efficiency Advanced 3-Layer Seamless Composite Upper offers breathability and eliminates hot spots by adapting to your foot shape, Bi-directional Closure wraps for a semi-custom fit and secure foot retention Boa IP1 reels allow 1mm micro-adjustability and pop up for full release, 1:1 Integrated Carbon Power Plate delivers feather-light stiffness (stiffness rating of 13), Replaceable heel bumper. SPD-SL Compatible