... satisfaction is our permanentpursuit2.What is its application?Non-toxic particle masks are usually used in the environment of low ... 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,comfortable, ...