Quantity   Component name
1 × Square of Kitchen Towel Or two rectangles of economy joined together
2 × Multiply Tissues Or four sheets of decent toilet paper. The fluffier the better!
2 × Thin Rubber Bands Or 1 thick one cut lengthways into two
1 × Avery Label large enough to cover the mask (9.5" x 3.5") I've included an SVG with the designs to print to scale.