Endura FS260-Pro Knee Warmers It's always the knees that feel it first. Windchill effects your knee area most as your knees are pointing forwards & taking the wind full-on. Your chest & shoulders also feel the brunt, but are more likely to be covered & protected from windchill. Simply put, a decent set of knee warmers protects the most exposed part of your body without overheating the rest of your legs. Look after your knees for comfort & extended good health!