Made with Smartwool's innovative Intraknit™ technology, the Men's Intraknit Thermal Merino Base Layer Colorblock Crew is designed with colorblock patterning for a distinctive look. It’s 3D-knit to enhance performance, and it offers mesh zones for better breathability in all the right places. Plus, this crew is built so that it fits as though it’s custom-made just for you. With enhanced durability features such as ribbed elbows, this shirt will last for a long time to come.