Our exclusive Alpaca Mid-Layer Quarter-Zip Pullover is a must-have cold weather layer. This bulk-free, 100% Alpaca wool thermal layer brings a new dimension to activewear. With seamlessly integrated insulation and ventilation, perfectly articulated comfort control, and the softness of alpaca wool, it’ll be the first thing you grab when you need a warmer layer on your high-intensity, high altitude adventures. Made with our own Alpaca Dry Fusion Technology®️ to keep up with all of your summer mountain activities. Grab a to throw on under this Mid-Layer pullover, and remember that you must use a breathable fabric underneath your Mid Layer in order to experience the benefits of Alpaca Wool. We recommend not wearing cotton, rayon or acrylic products underneath this layer because they trap moisture next to your body and don't allow the alpaca fibers to wick it away.