These really do the trick....as an older guy who has reduced circulation in his hands a feet I did consider buying heated gloves and socks but my time outdoors is often spent shoving show, roof raking and operating heavy equipment...I tend to wear out standard gloves/mittens regularly and the thought of having to replace heated gloves regularly was disconcerting.I use them with insulated mittens...they obviously would not heat one's cold fingertips if one was wearing gloves.