Excellent customer service
Very good customer service, quick and kind response to problems,that shows professionalism. Very satisfied with the masks , for me and for my children
By Customer
Monday, November 9, 2026 · Customer reviews of US businesses
The Fair Hearing score
Average
55 reviews
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Honesty, pricing, process and quality scores appear once 5 customers have rated them.
CosmO2 is listed under Health Equipment.
CosmO2 (cosmo2.com) has 55 customer reviews on The Fair Hearing, with an average rating of 3.6 out of 5.
Showing 31 reviews with 5 stars · Clear filters
Very good customer service, quick and kind response to problems,that shows professionalism. Very satisfied with the masks , for me and for my children
By Customer
qualitativ hochwertige Maske. Sehr praktische Wiederverwendung durchs waschen. Lieferung innerhalb 4 Tage. Alles top.
By Philip Zadeh R.
Professionel og hurtig ekspedition af ordren. Jeg modtog mine mundbind 1,5 døgn efter jeg havde bestilt dem. Den nye ejer har tydeligvis styr på sin forretning!
By Mette
It’s the far the best mask i have tried. I have found my mask 👌 Thanks Cosmo2
By Q M.
Mondkapjes vrij snel toegekomen
By Eve S.
Very good product. I'm totaly satisfied... I bought them for my family....I think one of the best mask on the market...
By Matej K.
Excellent communication High quality masks I definitely recommend them.
By Eftychios T.
Schnell und gutes preiß :)
By TJ