The Baselayer Top is a lightweight 5-ounce four-way stretch fabric that wicks moisture to keep you more comfortable. Lightweight, open-knit material delivers maximum breathability to keep you cool in warm weather, but also provides insulation during active periods on chilly days. The smooth finish allows for easy layering under other garments. Deep quarter-zip neck allows you to quickly vent unwanted body heat. Designed with one zippered accessory pocket on left chest.