This is something I didn't anticipate, but makes sense. My knee that I had surgery on gets noticeably colder when it dips below freezing. It starts with just an odd slightly cold feeling inside my knee where the hardware is. This isn't anything painful, just annoying since I really prefer not to notice any wonky body parts. Today it was a little colder, but not super cold (26F) out when I was walking the dogs, with a brisk wind. By the end of a half hour walk, my entire right leg was colder than my left one. I don't really want to put on a full baselayer when going outside in the winter since I'm trying to even things out between legs, but maybe a knee warmer/ sleeve on the one side could help. I took a quick look online and knee warmers do exist. Anyone here use one for skiing or biking?