5PCS, 4-layer breathable mask with hook Brand: TINAWELLS 4-layer purification: melt blown non woven, moderate thickness for particle absorption, double layer electrostatic filter, and highly efficient for filtering particles. Efficient Filtration: Filters at least 95% of dust, mist, droplets. Breathe Easy: Advanced non-woven fabric provides easier breathing. Ergonomic Design: Comfortable to wear, odorless low impedance filter material. Securely Sealed: The adaptable metal strip ensures an optimal connection between the bridge of the nose and the mask.