These beanies are made from the same material as our famous Aquafleece tops - Polyurethane coating on the outside combined with a fleece inner layer, a combination that virtually eliminates windchill and hence is very warm. Choose from either Grey, Khaki, Orange, Pink, Navy or Teal Features: The Polyurethane outer shell limits cooling effects of spray and windchill whilst the insulating inner fleece lining provides warmth from within. Secure loop for attaching Rooster Cap Leash Materials: Rooster PU laminated and bonded light fleece Composition: 88% Polyester, 12% PU Rooster Beanie Size Chart Cap Size Meteric(cm) Imperial(in) Small 52 cm - 55 cm 20" - 21 1/2" Medium 55 cm - 57 cm 22" - 22 1/2" Large 58 cm - 59 cm 23" - 23 1/2" X - Large 60 cm - 62 cm 24" - 24 1/2" Please measure round your head just above the ears then use the chart to find your cap size.