I'd wear a short sleeve windbreaker as soon as I'd wear a short sleeve dress shirt...
Ump-Attire ball bags do the job, I've never had negative feedback from a partner (Big Dog or Rook), and the zipper is a perfect place for car keys. Though I don't put the plate brush in the pouch, just my indicator.
Can't knock either WV, but I've been wearing a Honigs K1 for the six of the last seven years. It does the job just fine.
AR