This is a standard gauze mask. Due to long-term storage, some masks have slight brown stains or are generally yellowed. Please check the photos. *Sets of 10 and 20 masks are also available. Please consider those as well. Although new and unused, please understand that these have been stored for a long time, are pre-owned, have been stored at home, and have been inspected by a non-professional. Please consider these factors before purchasing. #mask #gauzemask #fabricmask #abenomask #lunchduty #washablemask #eco #infectionprevention