— Purchased with expectation of needing to combine with additional filter liner (so expectation met). — Seal around bridge of nose isn’t great (product not alone in this regard; many other Mask designs face same issue). — Thin foam construction less robust than I’d expected. — Longevity of “re-usability” very much dependent on careful handling and gentle hand washing. — On upside, easy to carry spare in pocket courtesy of individualised tear-open packaging for each mask in 6-pack.