Mii Estilo face masks are handmade with two layers of 100% cotton and elastic for behind the ears. There is a nose clip to fit to your face for greater protection. Mii Estilo face masks are not medical masks. They do not include particle filters, like N95 medical masks. They do offer protection and help to inhibit the transmission of viruses. Face masks are required for public use in many areas and are now recommended for outside the home. Mii Estilo face masks are not refundable due to hygiene. Your purchase allows us to continue providing health workers masks. You can read more about our partnership with hospitals in Holland here.