Hi Alex! I think for a century ride, the Bella fabric would be best with it's higher compression than the other Terry knickers. I am a huge fan of leg warmers though, and like them so much more than wearing tights over shorts. There are knickers on the Terry site which have a heavier fabric too for warmth, and I believe some warm tights with chamois too. If your centuries have lots of climbing, and it is cool, you will get chilly on the descents, and it's hard if you are shivering! I love the defeet "kneekers" leg warmers which come in coolmax or wool. But they are knee warmers, and leave some calf and ankle exposed to the elements, as would knickers. It is nice to be able to roll up your leg warmers in your jersey pocket for the start of a ride, then pull them on when you need them. (or vice versa) They are more comfortable than you would think too. Good luck on your rides! Tokie