feature: 1. New technology materials-New organic polymer sponges are different from ordinary sponges. Due to their three-dimensional network structure, they can filter fine particles in the air. Soft, thin and breathable, it is perfect for summer wear. 2. Economical and durable-do not discard the mask. Using aviation organic materials, anti-allergic. washable. Washing will not reduce the dustproof effect, it is more economical and more environmentally friendly than disposable masks 3. Humanized design-perfectly adheres to the face, has excellent elasticity, soft but always maintains its shape. 2 mm thick, very breathable, it will not cause oxygen deprivation, difficulty breathing and stuffy. Comfortable and stylish. 4. Function-Unlike ordinary masks that use a multi-layer structure to form a mesh structure to prevent dust, this PM2.5 mask is made of polyurethane, which is itself a 3D network structure. After precise sewing treatment, Its taste becomes very high. -Dust density space obstacles with a dust blocking rate of 99% have a strong defense against pollen, germs, dust, etc. specification: Product Type: Mask Material: 97% polyester fiber, 3% spandex Colour: Black Product size: as shown packing list: 1pc / 3pcs / 6pcs / 9pcs / 15pcs * Mask