Nano is composed of fibres, therefore it can be cleaned and reused up to 7 days. When sprayed alcohol on nano masks, the bacteria is destroyed but the filter is still perfectly intacted.
Other masks are usually made from meltblown material, it loses its properties when it gets wet or humid. It is non-reusable and filtration lasts about 4 hours. Do NOT spray/reuse non nano masks as alcohol will destroy the protection layer of the mask. publication
SAVE THE ENVIRONMENT
HOW TO RE-USE?
MAJOR DIFFERENCES NANOMASK VS OTHER (MELBLOWN) MASK