So, I have the strangest allergy. I thought I wouldn't have a problem again because I got rid of all of my canvas shoes - or so I thought. Yesterday, when I went to the company picnic and put my flip flops on, I didn't think about the fact that the straps are canvas.
Yes, that's right, I have a contact allergy to CANVAS. It takes a little while to cause problems, so my feet are really the only place it causes issues. I won't have an issue carrying a canvas bag, for instance. But put canvas shoes on my feet for more than an 30 minutes or so, and watch them freak out.