1.Cup-style protective respirator compliant with national standard GB2626-2019 (Level KN95). 2.3D cut design expands breathing space and enhances breathing comfort. 3.Individually adjustable aluminum nose clip allows customization of facial fit, providing excellent seal. 4.High-density polyurethane foam nose pad reduces leakage rate and improves wearer comfort. 5.Ultrasonic welded headbands ensure strong durability and enhance wearing comfort. 6.Patented foldable cup-style design for easy storage and portability.