The Castelli Seamless base layer is the base layer preferred by the pros of team Garmin and ideal to pair with a Castelli jersey. It is made with three different mesh patterns with the most open mesh located where you need the most ventilation. This base aggressively wicks moisture and is insanely soft next to the skin.
To optimize moisture transport, Castelli uses a proven Polypro/Nylon fabric blend. Polypropylene is a popular choice for performance base layers, as the fabric's fibers quickly transport moisture away from your skin. Once the moisture has reached this point, nylon layer takes over, transferring the moisture outward to the surface of the garment to evaporate there, keeping you dry and comfortable. This base is made to work in warm conditions, but it can also be layered with a long sleeve base in cooler weather to maximize moisture wicking