Patagonia black performance baselayer top

Classic baselayer for warmth and comfort in cold weather activities Smooth, soft face fabric enables easy layering on cold mornings Diamond-grid back traps warmth, wicks moisture for active comfort HeiQ Fresh Tech provides odor control for lasting freshness Raglan shoulders and underarm gussets offer full range of motion Zip neck style allows rapid heat dumps on strenuous ascents Elastic thumb loops secure the sleeves when you are layering up Fabric is bluesign approved and top is Fair Trade