The ultimate base layer for cold and windy conditions. Our Gore WS Long Sleeve features Gore’s lightest ever windproof, 4-way stretch fabric panel to date. Gore WS is strategically applied to Pro Zero fabric in order to maximize protection where you need it and ensure moisture transfer from the skin. Minimize your layers while protecting your core with our new Gore WS Long Sleeve.Personally I use this base layer when temps get below 35 degrees. This one article of clothing makes riding in cold temps a pleasure! I've taken this base down to 28 degrees with just an XC short sleeve on top (in the woods).