Undeniable Medicos!
9Not promoting but been using since MCO.
White box - Older packing
Blue Box - New Packing

Previously Medicos but now give me some RESPACK!

KN95 Respirator Protective Face Mask Specifications:
Chinese Standard GB2626:2006 (BFE ≥ 99% @3 microns, PFE ≥ 99% @0.1um
Type: 5 ply ear loop surgical mask, single-use, non-sterile
Made in Malaysia

Go search Respack at company's website or their official Lazada or Shopee for more details & pricing. Trusted & reputable Malaysian company and MDA approved manufacturer, they also produced ASTM & KF94 certified masks. Won't comment much about oversea suppliers or those who trade as MDA approved distributor.
Individually packed in 5, 10 or 20 masks/box. I bought 20masks/box.

5-ply still breathable and provide better enclosure at nose. If wear & tightened properly, won't fog my glasses as compared with double masking using cloth + surgical mask. Air won't easily escape from upper nose section to eyes/ glasses.

I have seen.
This is the 4-ply KN95 which I don't see them selling currently. Personally I have tried the same testing but the 5-ply doesn't leak. If worry, go try yourself to be convinced.