A Non Woven Fabric
B Meltblown Filter #1
C Activated Carbon Filter
D Meltblown Filter #2
E Non-Woven Fabric

Materials: 100% Polyester with Activated Carbon

Dimensions: Adult - 4.73"W x 3.15"H ; Kids - 4.04"W x 2.75"H 

Care: Do Not Wash. Replace after 4-6 days of use. 

Made in: Shanghai.