Silk is a protein fiber that contains amino acids close to skin ingredients. Because of its porous structure, it has excellent moisture absorption and heat retention, keeping you warm in winter and cool in summer. Once you put it on, you won't want to let go of it. I selected it because I want everyone to experience it. The smooth texture makes it comfortable to wear all day long. It has a seamless design with no seams on the sides, and it stretches well because it is milled. Silk, which is a natural material, is a little more expensive. But this feeling is worth it!