This offer includes one solid color mask with a filter. It comes in four different colors - black, navy blue, grey and red. The fabric used to create each mask is soft, non-abrasive cotton that will minimize irritation of the skin. Each mask is hand and machine washable, so you can add it to a load or cleanse it quickly and wear it an unlimited amount times. The elastic cords that wrap around the ears are adjustable, regardless of ear and head shape. This maximizes comfort and minimizes skin and ear irritation.