Brand: Kenmaru Size: One Size Use: Wrist Target Age: Adult Color: Black Material: Polyester, Polyurethane, Cotton [Concept] This garment is made by processing with Hokutolite, which is used in the bedrock bath of Tamagawa Onsen in Akita Prefecture. Hokutolite emits "far-infrared rays" and "negative ions," allowing you to receive benefits similar to a bedrock bath and forest bathing just by wearing it. [Quality] Made in Japan. Cotton, polyester, polyurethane processed with Hokutolite. [Product Overview] Dimensions: 7 x 15 cm. Free size, black/beige, unisex, year-round product, new. [Washing Instructions] Machine washable (recommended to use a laundry net/turn inside out for washing), easy and hassle-free washing.