I personally buy for years the only acceptable Flexfit Cap's with other sellers, mostly online.
The quality is great and stehts same color lasts long (except black with plenty of sunlight, which fades very quickly), there are only 2 variables, one of which always fits, once found the right size and always well advised.
From washing I have to advise against it at the wrinkles enstehten strengthen Strinseite the cap, looking for a long time as a kind of "Spanner", unfortunately not been able to find.