The RAPHA Deep Winter Windblock Base Layer - Black is a cycling baselayer designed for use in cold and windy conditions. Its primary function is to provide thermal insulation and wind protection for cyclists during winter rides. This base layer is suitable for layering under cycling jerseys or jackets to enhance comfort and temperature regulation. Constructed with windproof panels for added protection against cold air Designed for deep winter cycling and low-temperature environments Features a close-fitting cut to optimize layering and moisture management Made from technical synthetic fabrics for breathability and insulation Flatlock seams to minimize chafing during extended rides Long sleeves for full arm coverage Black colorway for understated appearance Suitable for use under cycling jerseys or jackets This base layer is intended to be worn as the first layer in a winter cycling clothing system, maximizing warmth while allowing moisture to escape. Available Variants: LARGE: 60601990