Small 3D立体構造 mask with 99% filter performance - Model: 3D立体構造 mask - Size: Small - Material: Polypropylene - Mask Size: 17cm x 7cm - Filter Performance: 99% cut I bought the wrong size and used two, but they still didn't fit, so I'm selling them. Each mask is individually wrapped, making it convenient to carry. Due to shipping costs, I will ship them without the box. Please refrain from purchasing if you are sensitive to used items. Instant purchase is OK. Thank you.