... . Your satisfaction is our permanentpursuit2.What is its application?Non-toxic particle masks are usually used in the environment of ... to wear3. Anti-aging, not easily deformed4. Good sealing5.Non-toxic, tasteless, no allergies, no skin irritation4.What is ... its specific features?1) Protect against non-toxic dusts,powders,pollen and other airborne irritants2) Lightweight, ...