All of our surgical-style masks are medical-grade, produced in regulated environments, suitable for clinical environments. They are tested and superior to 3-ply disposable masks. Manufactured by Leephick Pharmaceutic, one of the leading brands for medical and professional healthcare products in China. Leephick is an FDA-approved manufacturer on the EUA (Emergency Use Authorization) list for PPE (Personal Protective Equipment). Established in 1995, Leephick is well recognized for uncompromising quality and its products are widely distributed to hospitals.