Color: Black系 (Black-based) Stains, tears, odors, etc.: None These are lightweight sweatpants made with a special three-layer fabric that combines warmth and breathability. The stretchy knit fabric, made from recycled materials, is formed into a three-layer structure with a cardboard-like air chamber, creating a thick yet lightweight texture. This structure facilitates the generation of dead air, providing excellent insulation. The elimination of side seam stitching enhances comfort. Suitable for a wide range of activities, from training to everyday wear. Features electrostatic care design to suppress the generation of unpleasant static electricity.