The men’s MERINO 150 BASELAYER PATTERN Short Sleeve is a premium all-season adventure t-shirt, perfect for summer mountain biking and as a winter layer. This body temp regulating t-shirt features the properties and breathability of Smartwool merino wool. Core Spun technology wraps merino around a nylon core for added durability while keeping comfort next-to-your-skin. Smooth flatlock seams minimize chafing along with offset shoulder and side seams. The Baselayer Short Sleeve performs well on its own in warmer temps or layers up in colder temperatures.