Nano Fiber Filter Mask is an FDA Approved Product of South Korea. It is Thin and Light Light weight: 4.38 grams. Lighter than a sheet a paper. Ergonomic design for all day comfort. The Nano mask is designed to cover the nose down past the chin. The aluminum nose-clip allows the mask to form around the bridge of your nose. The elastic ear loops gently tighten the mask to ensure a secure fit. Trusted and True The Air Queen Nano Mask is manufactured in South Korea.