Hand made in San Francisco since 2002. These cotton face masks are made from 100% washable cotton, synthetic and cotton blend elastic, and plastic beads. They are two-ply (cotton on both sides), with an opening on either side to insert another layer of protection. The elastic is 9.5" inches long and has a bead application on each strap that allows for adjustable strap length. Wear separately or over an additional face mask for optimal coverage.