Kuromi reusable cloth face mask from Sanrio’s official store in Japan. Features a mesh lining and adjustable elastic ties around the ears. The material is infused with an antibacterial agent which will lose its effectiveness a little with each wash. Size: adult one size (14 x 10 cm).Material: 100% polyester. Elastic: 70% nylon, 30% urethane, toggle: silicone rubber. Washing instructions: Hand wash with a mild detergent, shape and dry in the shade.