This is not a medical grade mask. 2 layers. Size: adult Elastic: 6 inches of 1/4 inch width Lining is cotton in matching colors. This one has black, but I can switch them around! Just message & I’d love to make it perfect for you! Due to placement of pattern, mask might look slightly different. There is no insert for a filter & no metal nose peice. Elastic is non adjustable. (message me for bigger or smaller) Hand wash only for longevity. Unless specifically listed, each order is for one mask. Non refundable due to sanitary reasons. (But replaceable if pattern is available). Dark Blue Houndstooth Face Mask, Washable, & Cotton