All masks have removable/replaceable metal nose pieces and are 3 layers: a 100% cotton layer, a middle non-woven poly filter layer (oly*fun), and a poly/cotton fashion fabric layer. Masks can have over-ear elastic ($14) or straps ($20). Masks come in 4 sizes: L, M, Child, and Toddler, and are made to order. $6 shipping to US; email with request for international.