KAPELMUUR Polartec Winter Cap - Navy This cap is for cycling, but can also be used for other outdoor activities or everyday wear. I purchased it about 2 years ago and used it for a few hours during a winter hike, so it's almost new, but please refrain from purchasing if you are concerned. Material: Polyester, Polyurethane Head circumference: It says it fits 54cm to 63cm, but it might feel a little small for someone with a 63cm head. A cap with ear covers that blocks the cold winter air. The grid-patterned fleece lining combines breathability, quick-drying properties, and heat retention.