Worn only for fitting, not used for actual play. YONEX Windbreaker Pants Unisex S size Practice pants with lining, warm pants Heat Capsule specification Hem zippers ●Material: [Body] 100% Polyester [Lining] 100% Polyester ❍ Heat Capsule: To make the wear warmer. YONEX focused on infrared rays. The newly developed "Heat Capsule" is a "charging heat" system that converts ultraviolet rays from both sunlight and the human body, that is, both outside and inside, into heat and continues to maintain that warmth. ❍ Heat Capsule Charging Heat System ・Absorption: The first capsule absorbs infrared rays. ・Conversion: Converts absorbed infrared rays into heat. ・Accumulation: The second capsule accumulates the converted heat. ・Charging Heat: The inside of the wear is charged with the accumulated heat. ❍ Heat Capsule Surface Temperature: When continuously irradiated with infrared rays for a certain period of time, there is a difference of about 3 to 7°C in surface temperature compared to conventional cold-weather materials. Color: Black