We purchased 3 diving masks, of differing sizes, for an up coming holiday. The masks all look very good quality, but as we haven't used them in water yet I am unable to fully attest as to the fit, view, ease of use etc. I purchased the masks via the "Unwrap" website which leads to a link to "Decathlon" where, obviously the purchase is made. The reason for not giving the full 5 star rating is that the sizing guide on the website is different from the actual sizes of the masks. In the end I bought the biggest mask for me, had to let my wife try it on then buy a size smaller for her then let her friend try that one on and buy another size for her. A consistent sizing guide would probably enabled me to purchase all 3 at once. The purchases themselves went smoothly & delivery was fast.