Practical sleeveless tops are ideal for wearing under your jersey. To increase comfort, many manufacturers use non-chafing flat seams on the outside. These thin and breathable tops follow your movements without being distracting – becoming a second skin. To ensure optimum moisture-wicking, they're usually cut close to the body. Their direct contact with the skin means that you stay pleasantly dry and gain all the advantages of temperature regulation. Enjoy ideal ventilation on ascents (with your jersey zipper open) and optimum protection from the wind on descents (with the zipper closed).