Fit and Design: Slim fit baselayer top Classic, comfortable crewneck design Engineered construction uses knit structures to enhance performance with lighter weights and cleaner finish Mesh ventilation seamlessly knit in gender-specific zones designed to keep the body dry and comfortable 3D mapping results in near custom fit and freedom of movement Ribbed elbows provide added durability and extra flex room Technology: Merino Sport yarn combines the power of merino wool and polyester to move moisture, dry quickly, and hold its shape during high-sweat activities Additional Details: Weight: 208g / 7.34oz