Jeff -- many thanks for the tip! Hope the guy is recovering OK...

I tend to not store first aid ointments and medications in my car kit out of concern for extreme temperature fluctuations, but hadn't considered glove deterioration. Also, I only tend to carry no more than 2-3 pairs at a time.

What kind of gloves did you have, if you don't mind my asking, and how old were they? Is there a variety that might possibly be better than others in regards to storage?