These N95 masks are less than $1 each on Amazon today
Nafnlaus 🇮🇸🇺🇦 on Twitter: "Thread: Mask Fit Testing This evening, I decided to put all of my masks to a proper qualitative fit test using a nebulizer, bitrex solution, and improvised hood.
3M Aura 9330+ FFP3 Respirator N99 Medical Face Mask NR D Unvalved - EXPIRY 2025 | eBay
3M Aura Disposable Respirator 9332A+, FFP3, Non Woven Fabric, Flat Fold Mask, Elastic Headband Anti Air Pollution Respirator (Pack of 1) : Amazon.in: Industrial & Scientific