Feature: 1. NEW TECHLONOGY MATERIAL -- New organic polymer sponge, different from common one, it can filter tiny particle in the air due to its three - dimensional network structure. Soft, thin and breathable, great for summer wearing. 2. ECONOMIC & DURABLE -- Not disposable mask. Adopt aeronautical organic material, anti-allergic. It is washable. Washing will not reduce the effect of dustproof, more economic and ecofriendly than disposable mask 3. HUMANIZED DESIGNED -- Perfectly attach onto face with great elastic ability, soft but always keeps shape. 2mm thickness, very breathable, will not cause to oxygen deprivation, breath hard and stiflingly hot. Comfortable and fashion. 4. FUNCTION -- Different from common mask whose working principle is using multilayers to build net structure to block dust, this PM2.5 mouth mask is made of polyurethane which itself is 3D network structure, after precisely sewing processing, it became to a high-density space obstacles for dust whose dust blocking rate reached to 99% and it is of strong defense to pollen, sick virus, dust and so on. Specification: Item Type: Face Mask Material: 97% polyester, 3% spandex Color: Black, Pink, Blue, Gray (Optional) Item Size: As the picture show Package List: 1/10/15/20pcs * Face Mask