Originally Posted by
Kaminokaze
try and pull the bottom of the leg warmer up a little and have a bit of loose material at the knee cap. This helps me when riding.
I've found this technique to help with bike shorts as well. Some time after buying my first pair, I found that my waist had shrunk, while my thighs had gotten bigger, so if I wasn't careful, they would pull themselves down a little while riding.