More than just a base layer, the Alpha half-zip pullover is a technical garment designed to support active women through every adventure, from snowy trails to rocky climbs, ski slopes to forest runs. At its core lies Polartec® Alpha™ insulation, an innovative fabric technology that delivers intelligent thermal regulation. Unlike traditional insulation that traps heat uniformly, Alpha™ adapts in real time to your activity level. It keeps you warm when you’re still, and releases heat and moisture as soon as you pick up the pace , ensuring consistent comfort without overheating. Its lofty fibers