4 pieces of PM2.5 active carbon filters for toddler or kids size face masks.
+ 5 layer filtration system to effectively keep away dust & airborne contaminants
+ Disposable and non-washable - 7 days is the recommended time to change it out. If you use it up to 12 hours daily, please change it within 3 days. Dispose accordingly to your own comfort level
+ Measurements: 10 cm x 7 cm (3.94" x 2.75")
+ Made in China