dr. michael conti says it's a serious danger. >> if you don't have sensation, you're not going to feel a pebble in your shoe. >> i saw several podiatrists and they told me i would lose my foot. >> infection, then gangrene then afternoon indication. >> reporter: conti managed to save his foot. the socks >> these siren diabetic socks have sensors woven fabric to detect a foot um sir before it happens. >> testing your feet while you walk instead of while you sit in a doctor's office. >> they'll measure your feet in six spots. >> reporter: those are the same six spot where is the siren socks have sensors. people are told to check their feet every day, and that can be tough. >> not only can they not feel their feet well, they may have problems with vision, and may not be able to inspect their feet appropriately. >> when they launch late this year, they'll be sold by subscription, $20 a month for socks you can wash and dry like normal. >> crew socks, knee high socks, ankle socks. >> "7 on your side" is out at santana row tonight answering your questions. >> let's get right to michael finney, h