Perfectly quiet typing solution

So I'm in a situation where I need to use a non-touch laptop and type frequently next to a sleeping person, and I need a very quiet input device. Many keyboard products claim to quiet, but in my experience anything that has moving key caps are not quiet enough for this use case.

I can only think of two solutions that might work. One is capacitive touch keyboard which doesn't have mechanically moving keys. I played with the virtual keyboard on a tablet for a while. It's obviously awkward, but with the right key spacing and practise I think I can make it work. Is there any good product in this category? I prefer one that's wireless and has no numpad. The lighting also needs to be as dim as possible to avoid any unnecessary annoyance.

Another potential solution is gesture-based wearable keyboard such as the Tap Strap. Has anyone tried those? Do they make reasonable general-purpose PC keyboards? It it easy to switch between the Tap and a traditional keyboard once you're good with the gestures?