Fdx Cycling Cap fabricated in 85% Nylon 15% Spandex featuring Multi-membrane construct and flat-seam stitching offers unrivalled insulation during cold, snowy, or freezing cycling expeditions. Brushed Fleece Lined insert retains body heat for added insulation, and cross air-flow construction allows excess heat outside regulating optimum temperature while preventing overheating. Lighter than a hat, but warmer than a cotton cap, the winter cycling accessory promises full coverage including head and ears. Brim featured design protects scalp from sun, cold, rain, wind and dust also preventing hair breakage through over exposure. Close fit design easily allows under helmet fit-in without adding any mass.