If you have trouble falling asleep, here is something that you may not know. The National Sleep Foundation suggests warm feet when going to bed sends a signal to your brain that it is bedtime. Sleep research indicates a correlation between falling asleep quickly and increased blood dilation in our extremities. Another thing that may keep you from sleep is Restless Legs Syndrome (RLS), a condition that causes an uncontrollable urge to move your legs. Today there are socks with built in technology that will not only keep your feet warm but may provide relief from restless leg syndrome.