New, Unopened I accidentally purchased this. There is also an O size, which is a different size. Very Cool Cooling sensation of -3°C with xylitol effect. Natural xylitol, made from trees and plants, is used in the fabric. It lowers the temperature inside the garment by approximately 3°C by causing an endothermic reaction upon contact with sweat. UV Cut Effectively blocks sunlight and cuts harmful ultraviolet rays to the skin. PRECISION MOVE The badminton game shirt has uniquely shaped parts with different stretch directions placed under the armpits, eliminating the feeling of tightness in the garment and making it easier to move. There are fewer seams under the armpits, reducing uncomfortable rubbing. The pants also have a unique three-dimensional shape, making it easier to step forward. Air Release Controls airflow with high breathability. Mesh fabric with excellent breathability releases heat (steam) and efficiently takes in and circulates fresh air, keeping the inside of the garment comfortable. Sweat-Absorbing and Quick-Drying Unpleasant sweat is quickly absorbed and dried, keeping the inside of the garment dry and comfortable. Anti-Static Anti-static thread is used in the sewing. It suppresses unpleasant static electricity when putting on and taking off the garment.