I deer hunt in an enclosed blind and fish in an open bow of a friends 14' boat in some very cold weather. For years I have layered clothing for the temperature outside and have been able to keep mostly warm but have extremely limited movement when many layers are needed for the wind chill. I also hate to try to dress for for sitting in 20° temps and then sweat on the walk out to the blind. With the blind setup heating it is possible, but last year the mice took over my little buddy heater and almost caused a fire in the blind. Lately I have been looking at some electrically heated clothing especially a vest and pants so I can limit the layers to help mobility and still keep warm. O do not want to replace the heater if I can buy heated clothing that will also help me with fishing. Milwaukee has a line of clothing that uses battery's common to their power tools and others have USB chargeable batteries built in. The prices are not crazy ranging from $100 to $300 for what I want. Does anyone have experiences either good or bad with this new stuff ? Thanks for any help.