Sales proceeds will go towards donations of masks to those in need. Reusable 3-layer fabric mask with replaceable filter. Mask features pocket for replaceable filter. Outer fabric made from 100% cotton. Inner lining made of cotton jersey. Mask comes with one (1) felt replacement filter that can be cleaned and washed. Filter may include wool. Elastic straps can be tied for adjustability and increased comfort. Options for replaceable filter media are felt (one included), wool felt, toilet tissue, 6-layer gauze, non-woven diaper fabric, melt-blown non-woven fabric. Overall dimensions: 8" x 5.5" May Shrink In Wash.