From 3 to 13 years old
1. Made of environmental friendly material, moisture-proof, non-toxic, non-irritating, soft and comfortable.
2. Breathable material and cute patterns, which makes it useful and fashionable.
3. Special 3 ply non-woven design, provides protections against virus, dust, automobile exhaust, pollen, etc.
It is recommended to replace them if you use it continuously more than 4 hours!