4 pieces of PM2.5 active carbon filters forface 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: 12 cm x 8.5 cm (4.7" x 3.35") + Made in China
Note: that this is one size only &will not fit toddler sized masks.
Free shipping over $100; Standard shipping rates apply. All items are made-to-order & shipped within 3-9 business days.