The good ideas keep coming!
The advice to keep the license, insurance card, emergency information, etc. with you (in jersey pocket or elsewhere on your person) is right on. When emergencies occur, people kick into fast gear, and the shortest distance between points A and B rarely includes methodically checking all the equipment for cards and personal belongings.
The idea here is to keep it simple and make it easy for others.
I think I'll get some bright theme buttons so I can close one of the pockets on each of my jerseys.
After all this work, I don't want the cards to slide out.
Barb