Quality cycling caps made from functional comfortable fabrics these well designed cycling caps are stylish yet durable and work well both on and off the bikewalz wool fabric is 100 medium weight 10 12 ounces wool flannel which is soft and smooth on your head and can be worn under the helmet through all seasons 100 wool hand wash or dry clean elastic in ear flap holds flap snuggly over ears moisture wicking band soft comfortable and flexible bill stabilizer available