Craft's COOL Mesh Superlight Sleeveless Base Layer contradicts much of what we've come to know about base layers. Unlike many others built to trap heat, the COOL Mesh Superlight aids in elevating moisture transfer, and is designed to create a evaporative cooler effect, pulling air in through its fibers and cooling it along the way. Super-light and airy, the base layer's big-hole mesh consists of 6-channel fibers that actively pull sweat off your body for superior ventilation and cooling.