[Byron]

I only asked as rubber and steel are seamless but there must inevitably be an uncomfortable bump where two halves of Velcro lap over each other (and is there not an issue of personal hygiene to consider when the intricate surfaces of that fastening must be kept scrupulously clean?).

Although there may be no personal problem of an erectile disfunction do not some guys nevertheless like to create the up-and-out effect to impress in the wearing of their speedos?
The bit I do not understand is how suitable the non-Velcro rings are for guys with large testicles - presumably the diameter has to be sufficient to allow
the various bits of human tissue to pass through, but having achieved that is there not a very loose fit when at last it is positioned behind them?