Black Diamond Women's Solution 150 Merino Base Layer Crew Shirt - Designed for high-output activity in the mountains, the Solution 150 Merino Baselayer Crew builds the foundation for your skin-to-environment layering system. Featuring innovative patented NuYarn stretch merino wool-a fabric that's stronger, warmer, and dries faster than other merino wool fabrics by utilizing the technology of wrapping a nylon core with extra-fine merino fiber-the Solution 150 Baselayer Crew offers superior thermoregulation and moisture management and is naturally bacteria and odor resistant. Non-Mulsed Merino Certified Wool Flatlock stitching eliminates chaffing Integrated thumb-holes Slim fit 146g Merino Wool Blend Single Jersey (78% Merino Wool, 22% Polyester)