Specification :
Product weight：32g
Implementation standards: GBT32610-2016
Storage environment: Save at room temperature
Package includes: Body mask, lanyard, instruction card, filter element + filter element holder
Main material: Food grade silicone
Production Date On the package
Shelf life: 3 years
Note: 1 mask will come with （5-10） Exchangeable Filter Element（according to customer requirement）
https://www.lk-silicone.com/mask/silicone-mask/replacement-filter-antifog-silicone-face.html