Designed for the resistance of fire and high temperature: this mask is made of Polymide Film, the advanced film for resistance of fire and high temperature has already been used by NASA in USA for covering the main electronic equipment of space shuttle. Under the high temperature of fire, the mask will not be melted to prevent the face from burning by fire. The mask will not have smoke come out to affect the breath. Proof : Fire resistance function UL. 94. V-0 grade, USA (Test NO:236441)

Temperature resistance function Nonmelting in 30 minutes under 450℃ degree tested by Mark Examination Bureau (Test NO:90303006096)

Fire resistance function ： Temperature resistance function Non-melting in 20 minutes under 455℃+/-5℃degree tested by Taiwan Textile Research Institute (Test report No. TPF8F149)

Activated Carbon Filtration Efficiency (ASTM D5746-16, Test Report No. 1 0954C03457-3-I-02