New Material Composition: 67.4% Rayon, 26% Acrylic, 6.6% Spandex Washing Instructions: Machine Wash About this product [Product Specifications: Material]: 67.4% Rayon, 26% Acrylic, 6.6% Spandex. Sizes: M (Hips 87-95cm), L (Hips 92-100cm), XL (Hips 97-105cm), 3L (Hips 102-110cm). Available in a set of 3 different colors and 4 sizes from M to 3L, suitable for a wide range of ages and body types. [Heat Retention & Moisture-Absorbing Heat Generation Function]: The main fabric uses acrylic fibers, and because the yarn is fine and fluffy, it has excellent heat retention due to the brushed processing. It generates heat by converting moisture evaporated from the body into thermal energy, trapping the heat and keeping you warm, protecting your abdomen from the cold. You can easily warm up just by wearing them. [High-Waist Type]: Deep-waist type that wraps around from above the navel to the hips, protecting your abdomen from the cold while providing a secure and comfortable fit. It thoroughly warms your body by covering from the abdomen to the hips. Recommended not only for the cold season but also for "blue days" (menstrual periods). [Comfortable to Wear]: The flexible and highly elastic material naturally fits the body's movements and doesn't feel constricting. The washing instructions are printed, reducing irritation to the skin and preventing itching! You can move freely during daily activities and exercise, and spend the day comfortably. [Design that Doesn't Dig In]: The waist and leg openings do not use elastic, resulting in a design that doesn't dig in or create a visible line. Highly recommended for those who are concerned about constriction or digging in.