Want a shirt that looks good, but plays better? Smartwool's freshly redesigned Merino 150 Short Sleeve works undercover as a base layer on cool mornings, or as a stand-alone piece for warmer days. Featuring Core Spun technology, they??ve wrapped Merino around a nylon core to increase durability, while still keeping the temperature regulation and moisture management benefits of ultra-soft Merino next to skin. With smooth merrow stitching and raglan sleeves, you can stay comfortable in your clothes and confident in your look.