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Two layers of natural Cotton. Elastic straps for comfort. Reusable and machine washable. Reversible, can be used either way. One-size-fits-all. Made from 100% natural cotton, this face mask is reusable and washable.. It's a two layered mask and features a blue cross design, with a plain black reverse. It's fully reversible, so can be worn either way.. The slimline pleated design fits easily in your pocket when you're on the move, and opens out to a full sized mask.. It comes with an elastic fitting for comfort, one-size-fits-all.. A natural face mask, which is handmade in the U.K.. Please Note: These masks are not medical grade masks. Please wash after each use.