Design PhilosophyDesigned for the hardcore roadie who isn\'t fazed when the mercury drops, the Pro SL winter cap provides excellent coverage on the back of your neck and over your ears. The combination of the peak and C0 DWR treated Thermoroubaix and windproof fabrics makes this a go to cold weather product. Multi Fabric ConstructionCareful, clever fabric placmemt utilises 4 way high stretch windproof panels and luxurious thermoroubaix, providing a fantastic balance between weather protection and warmth. Thermoroubaix with DWR M™ Thermoroubaix® is a luxurious, high stretch thermal fabric that provides comfortable insulation and features the PFC Free DWR M™ treatment for excellent eco friendly water repellencey.