Hickory stripe denim fabric, tumble dry low. Mask is double layered and has a third open layer to accommodate a filter such us a PM2.5 (find them on Amazon) or cut up coffee filters, vacuum bags or tea towels. Pattern placement may vary. Elastic is purposefully left long in order to fit the most head sizes. If you apply a small flat knot at each end, it will size the mask down without affecting comfort.