The Endura Pro SL Thermal Windproof Jacket makes for a great winter garment to cut out the cold. The athletic fit means no excess fabric to catch the wind and slow you down. For the colder days of winter having an insulating and windproof jacket is a real boon to maintain a comfortable temperature. The warmer you are the more time and energy you can put in to riding. The stretch in the fabric allows for a close to body fit, meaning less energy wasted battling wind resistance. More energy equals more miles in comfort.  Endura Pro SL Thermal Windproof Jacket Features High stretch, windproof fabric with thermal lining on front, sleeves and center back High wicking, stretch thermal rear side panels High cut, double layer collar for warmth and comfort Extended cuff for a glove integration External rear elastic with inner silicone gripper Three rear pockets with additional zipped security pocket Reflective trim Endura Pro SL Thermal Windproof Jacket Materials Main: Polyester 80% / Elastane 10% / PU 10% Trim: Nylon 52% / Polyester 32% / Elastane 16%