I believe you are thinking of Illuminite.

Out of curiosity, is this 'undercover' garment being used for breaking and entering near a busy freeway? I am intrigued by your requirements...

ProViz may have what you want.

Seconded.

I have one of their vests and it’s a beacon of light when it gets into headlights. I use that and some cheap reflective cycling socks I found on Amazon. Coupled with headlight, taillights, and strobing wheel lights I feel as safe as I think I can be at dawn/dusk/night.

If I get hit it’s not because I wasn’t seen.

well, its for commuting - I like a somewhat neutral kit for walking past colleagues, biking in the daylight, doing shopping on way home, group rides but then would value the sudden unignorable extra visibility at night through intersections or in situations with cars

Proviz looks great because , although grey not black still simple looking, 360 reflection with a breathable back but they dont have my size stock in Netherlands right now
Illuminite same as above
Wowow looks nice because designed for bikers but its a bit pricey

thanks for the tips so far!

Gotcha. This might be a good list for you:

https://road.cc/...d-accessories-214008