Chigoba cha nkhope ndi mtundu wa zinthu zaukhondo, zomwe nthawi zambiri zimavala pakamwa ndi mphuno kuti zisefe mpweya wolowa mkamwa ndi mphuno kuti utseke mpweya woipa, fungo, madontho, mavairasi ndi zinthu zina.Amapangidwa ndi gauze kapena pepala.Tili ndi chigoba chachipatala komanso chigoba chakumaso, monga N95, KN95, FFP2, FFP3.