The packing list says "Rain coat or poncho (green/camo)"
CAP uses the old woodland BDU's for their field uniform. Back in my day (makes me feel old) we wore the OD green "pickle suits" and couldn't wait to get the "new" BDU's. Now everyone wants to know when they'll get ABU's so they can ditch the uncool BDU's.
The only thing CAP issues is one short-sleeve blues uniform courtesy of the USAF. Local squadrons may have a stash of BDU's and other of other items but you're pretty much on your own.
Oh, OK. CAP is Civilian Air Patrol, right?
When does he need it by? I have a BDU-pattern ECWCS rain pant/jacket set he can borrow, size M-R.
As for the ABU, I'd swear off those. The material is about 2x thicker than a 'field' style BDU - in other words, HOT. I've heard that they're actually putting out a thinner version. Why they didn't stick with the 50/50 NYCO, I have no idea.