Thinsulate 400 gram insulation for warmth, with waterproof, seam-sealed internal bootie construction and reflective heat-loss barrier in the sole. Sealed canopy and neoprene collar keep heat in and water out. Nylon composite sole for efficient yet compliant comfort: Stiffness Index 6.0. Single Boa L4 dial for a snug fit. High visibility reflective accents for low-light riding. Wide fit to accommodate winter weight socks-no need to size up. Body Geometry outsole and footbed optimize alignment to improve performance and comfort. 3-bolt cleat pattern fits all major road pedals. Approximate weight: 407g (1/2 pair 42).