Sixs WTJ Wind Stopper Jersey Jacket Size:XL Self Cleaning and Self Sharpening tread pattern Designed for the highest Self Cleaning and Self Sharpening tread pattern gives excellent predictability and power delivery yet won’t damage air filters In the portions more subject to perspiration to use on top of SIXS Underwear and underneath another technical outerwear garment • Comfort fit : The back area where there is no direct contact with air has inserts in Thermo Carbon Underwear® that maintains thermoregulation by taking sweat away to the outside and keeping the skin dry • Brainy position : The bottom abdomen and back areas are thermally insulated by ThermoPile® • Materials : Winter Barrier® Water repellent