Smartwool Merino Wool Pullover Next-to-Skin Base Layer 1/2 Zip Gray Size Large Next-to-Skin Base Layer Perfect for when the weather turns in an instant. The neck zips up into a turtleneck, and zips down for extra ventilation. Made from SmartWool's warmest baselayer fabric, this new piece for Fall features thumbholes for extra coverage COLD WEATHER BASE LAYER. This bulk-free, 100% Merino wool thermal layer brings a new dimension to active winter wear. Loaded with features, it'll be the first thing you grab when you need a warmer layer for your high-intensity, cold-weather adventures. 100% Merino Wool WHY MERINO WOOL? Thinner and softer than regular wool, it's easy to wear next to skin. Each fiber transports sweat away as a vapor (we tested it ourselves) and regulates body temperature to keep you cool in summer and warm in winter. Care instructions MACHINE WASH WARM GENTLE CYCLE. WASH WITH LIKE COLORS. GUC - preowned, no visible flaws or defects noted.