Cleanroom Cup-type Mask

Feature: 1. Design with exhalation valve, reduce the heat accumulation, make breathing more easily. 2.Non-toxic, odorless, non-allergic, high filter efficiency, low resistance. 3.Adjustable nose clip make both masks and face being sealed better, dust particles cannot be easily bled in. 4.Filter layer treated with electrostatic, effectively filter and adsorb tiny harmful industrial dust, prevent silicosis 5.Ultrasonic welding, elastic spandex silk material protect the wearer