These leg warmers offer excellent heat retention. I purchased them on Rakuten for around 5500 yen. I've worn them a few times, so there are no noticeable scratches or stains. Color: Black Size: Approximately outer diameter 12 x height 36 x thickness 3cm Material: Outer fabric: 86% nylon, 14% polyurethane; Filling: polystyrene * Hand washable, machine washable (spin cycle only) They keep your body heat in, providing warmth without electricity, making them safe, secure, and eco-friendly! Suitable for those who want to warm their ankles or prevent drafts from their ankles, they can be used throughout the year. Recommended for those with ankle sizes up to 26cm. The slim size is comfortable without slipping or feeling tight. Suitable for those with calf circumferences up to 47cm. The zipper design makes them easy to put on and take off. Leg warmers long men's women's warm ankles calves warm thick warming activities cold protection wrap winter sensitivity to cold cold measures