The Endura Pro SL Skull Cap is a rugged cold weather essential, the Pro SL Skull Cap keeps you riding all year. The perfect product to keep you riding your bike in the colder months. Endura Pro SL Skull Cap Features 4-way high stretch windproof panels protect critical areas Luxurious Thermoroubaix® panels with PFC Free DWR M™ treatment provide insulation, comfort and water repellency Low profile U-form binding Ergonomic, pre-shaped panel construction Dark reflective trim Endura Pro SL Skull Cap Materials Polyester 54% / Nylon 27% / Elastane 14% / PU 5%