Three or four years ago, the new big thing was a transparent plastic device that fully enclosed the penis and balls. I believe it was Swiss. It had good reviews, I seem to recall (or maybe just good marketing). What was it called and what became of it? It seems to have disappeared without trace. Maybe the marketing wasn't so good after all.
Perhaps you mean the Dick Cage, which partly covers the scrotum. Or then again, perhaps you don't. giggle.
Nope, that wasn't it. No "partly" about it. It had a locking ring behind the testes and the cage was in two halves, moulded to the shape of testes and penis. It covered the whole kit and caboodle. One reviewer said he wore it in the shower and couldn't even feel hot or cold water through it.
Yep its the Exobelt X-1. Ive had mine for years. Love it for T&D and my wife loves to lock me in it when she really wants to get me worked up. She loves that I cant touch myself and I like the depravation feeling. We use it for play, but for long term I use the Extreme.
I stumbled across the Exobelt Extreme on a site called uberkinky it looks like what you describe. I've included the link. http://www.uberkinky.co.uk/exobelt-extreme-82398.html