Sitka Fortitude Full-Zip Midnight Mens 2XL - 80013-MT-XXLp FORTITUTE FULL ZIP ? Available in sizes small, medium, large, x-large, 2x-large, and 3x-large. (Available Colors: Bark and Midnight). POLARTEC THERMAL PRO ? A performance fleece with all the comfort, warmth and breathability of a traditional fleece with the added benefit of compressing down 1/3 more than other fleece fabrics, taking up less space in your bags. The fleece construction also offers added wind protection, weather resistance and an exterior that stands up to abrasion while offering a soft brushed fleece interior for superior comfort.