https://www.surplusandoutdoors.com/shop/outdoor-clothing/multicam-clothing-webbing/mtp-multicam-lightweight-paclite-1105119.html
How small do they fold up?

Good jacket. I’ve had one for a couple of years for general outdoor stuff. They are not pack light material. But a robust gortex they will take some abuse. You wouldn’t roll one up and stuff it in your jersey pocket. But you could get one in a descent sized camelbac

As if the MoD would spend extra on Pac Lite Gore Tex!

“gortex style” ?

Army paclite = Must still be able to be used as a hammock and stretcher.