I could not find the expiration date on the package. What does 7H21 stand for? Thank you.
Feb 26, 2020
Hi! This is what I found on their website. It seems that your mask is from 2017. I just bought one and the code is 9L30, meaning production date is 2019, most probably December. There is no expiration date, the product should be good for 12 months after you open it.
You can determine a product’s manufactured date by locating the lot number. Lot codes are found on the primary package (tube crimp, jar bottom, on wrap label, etc.). While it may depend on the product, you can translate most manufacturing lot codes in the following way:
Manufacturing Lot Code Example: 1B01
1 = Numeric representation of the year (2011)
B = Alpha representing month of manufacture (see table
01 = Numeric representing batch number ever made of the
1B01 = Manufactured in 2011, February, first batch ever made
of the product
Sep 11, 2020
I found expiration date on product detail page, its' January 2024