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You should buy KN95 face mask   1. It is strictly prohibited to use after the package is damaged;2. The production date and validity period shall be shown in the seal of the package or the bag's qualification certificate. Storage conditions: Temperature(-30℃~+40℃), humidity(＜80%), avoid direct sunshine. Source： https://www.unisourcesgroup.com/Daily_use/

1. It is strictly prohibited to use after the package is damaged;2. The production date and validity period shall be shown in the seal of the package or the bag's qualification certificate. Storage conditions: Temperature(-30℃~+40℃), humidity(＜80%), avoid direct sunshine. Source： https://www.unisourcesgroup.com/Daily_use/

Precautions: 1. It is strictly prohibited to use after the package is damaged;2. The production date and validity period shall be shown in the seal of the package or the bag's qualification certificate. Storage conditions: dry, room temperature storage, avoid direct sunlight. Source: https://www.unisourcesgroup.com/Daily_use/

Product standard: GB 2626-2006 Product performance: Filtration efficiency ≥95% Material structure: the product is composed of 5 layers of materials, including two layers of spunbonded material, melt-sprayed material and needled cotton, which are used for blocking particles and body fluids in the air.Plastic strip, good plasticity, safety veneer. Usage: 1.  Confirm the front and back, wear the ear hanger;2. Close to the face, pull back the mask to completely cover the nose and chin;3. Press on the bridge of the nose and press on both cheeks from the bridge of the nose. Source: https://www.unisourcesgroup.com/Daily_use/

KN95 Professional mask Precautions: 1. It is strictly prohibited to use after the package is damaged;2. The production date and validity period shall be shown in the seal of the package or the bag's qualification certificate. Storage conditions: dry, room temperature storage, avoid direct sunlight. Relying on high-quality products and services, perfect business management, with the vision of "make the world a better and healthier", carry forward the "spiritual and benevolent" enterprise spirit, and work with friends from all walks of life to make unremitting efforts to create a more brilliant tomorrow . Source:   https://www.unisourcesgroup.com/Daily_use/

Three layers of protection, Authority detection n, Dustproof close skin, Adsorption odor, Comfortable and breathablen. Material structure: the product is composed of 5 layers of materials, including two layers of spunbonded material, melt-sprayed material and needled cotton, which are used for blocking particles and body fluids in the air.Plastic strip, good plasticity, safety veneer. UNISOURCES GROUP, which was first established in 1998, is a comprehensive enterprise focusing on the strategic layout of "breathing health" integrating R & D, production and sales. Served the top 5 industry customers in each country in the world, and provided "Air and Dust Separation" IAQC (Indoor Air Quality) technical support for world-class companies such as 3M, Bosch, and Panasonic. Relying on its more than 20 years of development experience, the company actively seeks innovative business operations, develops multi-industry and global development with the mar...

Usage: 1. Confirm the front and back, wear the ear hanger;2. Close to the face, pull back the mask to completely cover the nose and chin;3. Press on the bridge of the nose and press on both cheeks from the bridge of the nose. Precautions: 1. It is strictly prohibited to use after the package is damaged;2. The production date and validity period shall be shown in the seal of the package or the bag's qualification certificate. Storage conditions: dry, room temperature storage, avoid direct sunlight. Please refer to the instruction for other information. Source:   https://www.unisourcesgroup.com/Daily_use/