First Lite - Women's 170g Lupine Merino Long Sleeve Crew Top in Black SM - Black 17.5 micron ultrafine Merino wool Pure Merino Wool is naturally antibacterial, meaning there is no treatment necessary to retain its odor resistant quality even when used for several days in a row Unlike other fabrics, Merino keeps you comfortable from extremely high temperatures down to the coldest digits as well Covered by First Lite's Warranty