Bests & Worsts Reviews from Amazon

I've ordered these masks twice. The first time I ordered, I was extremely impressed by the design and quality of the masks. The second time I ordered, I was extremely disappointed. On the second order, the mask material was visibly different, felt different, and not breathable, which meant air couldn't travel through the multiple protective layers of the mask and instead came in and out unfiltered through the edges of the mask, especially around the nose. The first batch of masks, the good ones, had "RANG" text on the front of the masks, came with a nice flyer from Alliable Medical about other masks they sell, and had a certificate stating which Korean, US, EU, etc. standard the masks met; the second batch of masks didn't have "RANG" on the front and instead only showed "MB 100" in another location of the mask. The second order also had no flyer or certificate. If I knew I would get again the first masks I received, I would buy again, but out of fear of receiving the masks I received the second time, I can't recommend. AMAZON, please fix you counterfeit problem!