Want a Smartwool® base layer that looks good, but plays better? Smartwool's Merino 150 Short Sleeve shirt works well for any adventure. This base layer features Core Spun technology—which features Merino wrapped around a nylon core for added durability while still keeping the comfort of ultra-soft, responsibly sourced Merino next to skin. With smooth merrow stitching and raglan sleeves, you can stay comfortable in your clothes and confident in your look.