Mountain Hardwear W AirMesh 1/4 Zip

A single-layer garment can be more effective than you think. This sweater may look unassuming, but once you put it on, you'll experience a pleasant surprise. Made from unique active mesh with tubular hollow fibers that expand radially, it absorbs sweat, dries quickly, and provides excellent insulation to keep you comfortably warm even in the cold or while lounging on the sofa. And it weighs half as much compared to yarns of similar strength. The possibilities are endless.