Women's Columbia Omni-Heat Infinity Knit Long Sleeve Base Layer 1090-2012291 This stretchy baselayer is ultra comfortable and wicking, with a thermal-reflective lining that helps retain warmth while you move. Features Captures and neutralizes Odor for long-lasting freshness. Omni-Heat™ Infinity advanced thermal reflective. Omni-Wick™. Comfort stretch. Women's Columbia Omni-Heat Infinity Knit Long Sleeve Base Layer