The Tuo Gear Men's Kinetic Merino 200 Zip-T is a single jersey base layer that features a high heat-to-warmth ratio while the half-zip design and superior breathability allow for temperature regulation in any scenario. The naturally moisture-wicking and antimicrobial properties of the merino wool are paired with the added stretch of spandex to make the Zip-T a perfect option for next-to-skin comfort and performance. Features95% 19.5-micron merino wool, 5% spandex200-gram fabric weightSingle jersey fabric for exceptional breathabilityNaturally moisture-wicking & antimicrobialHalf-zip design for easy layering and temperature regulationFlatlock seams for next-to-skin comfort