Sample Item: SILK Polyester Half Coat - Simple and sophisticated design. - Color: Black - Design: Double-breasted - Brand: CAPTAIN SUNSHINE - Material: 55% Polyester, 45% Silk - Style: Coat Size 4 FREE SIZE Silk contains a lot of air between its fibers, making it a material with excellent heat retention and temperature regulation, keeping you warm in winter and cool in summer. Even though it's thin, it feels warm, and it's less likely to make you feel cold from sweat due to its high moisture absorption and release properties. Air Insulation Effect: Silk fibers have countless gaps that trap air, blocking out the outside air and retaining body heat. This is the same principle as a down jacket. Excellent Temperature Regulation: It maintains a comfortable temperature according to body temperature, adjusting to a state that is neither too hot nor too cold. This is similar to the function of a cocoon that keeps the internal temperature constant. Moisture Absorption and Release: It quickly absorbs sweat and releases it to the outside, preventing chills from sweat. It is also a gentle material for dry winter skin. 370