[Wilson]

Obviously you wouldn't be wearing a CIRAS if you're driving the vehicle, you'd be wearing some form of PACA soft body armour and you'd slip the CIRAS on once outside of the vehicle. It's nice because everything is on there, there's no fussing with straps or clips or any of that nonsense, it's just a matter of slipping it on and you're good to go. This is done easily if you adjust it to fit loosely.

Mind you, I'm not in the forces so I don't know how much the troops are permitted to customize their equipment. I'm assuming that if you can wear a vest of your choosing then the armour may be as well.