All masks are made from 100% cotton, double layered and reversible. The front is made with an A Love Supreme print, and the reverse has a plain dark blue/grey cotton - which some men prefer! We also included an opening for an insert, to convert mask to triple layer. You can insert your own disposable or washable insert which can be anything from a layer of kitchen paper, a coffee filter, HEPA vacuum bag (with no fibreglass) to high-quality, high thread count cotton (if you can bear to cut up your pillow case!). We included a thin wire that is inserted into the top binding to allow a perfect fit. Please note the printed fabric will fade over time due to hot ironing, which is recommended for disinfection.