Men's Columbia Omni-Heat Infinity Knit Long Sleeve Base Layer 1090-2012331 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™. 4-way comfort stretch. Men's Columbia Omni-Heat Infinity Knit Long Sleeve Base Layer