The mask has good rebound, strong sealing, no deformation, anti-aging, no fading, corrosion resistance, high and low-temperature resistance. The normal service life of the silicone mask is more than 1 year, which makes the use cost lower. The blocking and rapid emptying of the one-way valve prevent secondary pollution to the inside of the mask with the exhaling gas of the user.
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This post was written by kibria