Bought a pair of Pearl Izumi Therma Fleece Knee Warmers at REI yesterday. The guy there suggested buying one size smaller than what I would think was right, because they start working their way down your leg as you ride, and the "right" size wouldn't stay up.
So I tried on XL and L, and brought home the L. Well, guess what. It starts riding down my leg! So now I have to go back and exchange for a M I guess. Who woulda thunk?
I hate the idea of going back to REI the very next day. It's not likely that I can simply exchange the knee warmers. I'll be bringing home socks and God knows what else. It's like going to the store for milk, and running up a $75 bill. Sigh!