Introductions discussion

hey everyone So I had NEVER even considered chastity before, but my wife stumbled across a thread out on the deep dark web and suggested we give it a try… After some thought, I reluctantly agreed, but now I’m stuck trying to track down a device… It’s proving much trickier than expected, so I really need guidance from all you experts here. Problem #1: Since my job is at an airport, naturally the device must be 100% non-metallic, or it simply won’t work. Problem #2: Despite doing some research, I still can’t figure out which device fits best for me regarding length, width, etc. Any advice would be greatly appreciated, thanks in advance.