Where to Find Expiry Dates on 3M Aura Masks?

In a hurry?
Simply unfold your 3M Aura respirator, flip it so you are looking at the inner surface, and read the “use-by” date that is stamped on the lower (chin) panel.

Why the date matters

3M rates the Aura 9300+ series for a five-year shelf life when the mask is stored in its original wrapper under cool, dry conditions.

After that period the electrostatic filter media can lose efficiency and the head-straps may begin to degrade, so the respirator may no longer achieve its assigned protection factor.

One-step location check

1. Open the mask fully – the Aura’s tri-panel design lets you flatten the nose, middle and chin panels.
   

2. Face the inside surface – if you can read “3M Aura 9330+” the right way up, rotate it 180 ° so the text is upside-down.

3. Look at the chin panel – the expiry appears as a stamped line such as 2027/01/28 (YYYY/MM/DD). It is printed on every genuine mask as well as on the carton.
   

Tip: while the mask is still sealed you can usually spot the same date through the clear wrapper.

Troubleshooting quick-guide

Pro-tips for longer service life

• Store cool and dry – keep between –20 °C and +25 °C and below 80 % RH to avoid premature strap or filter degradation.

• Leave the wrapper on until you’re ready to don the respirator; the sealed pouch protects the electrostatic charge.
  

• Batch-check on delivery – when a new case arrives, spot-check one mask’s chin panel so you are never surprised by a close expiry date.