I'm an aircraft mechanic and I wear battery powered socks every day ut on the flightline when it gets cold. I have bad circulation in my toes as well. They feel a little akward at first, but after a few minutes, I don't notice it. The heating element goes where your toes meet your foot. You can't actually feel heat, but it warms up to about body temperature so you don't get cold, but you don't get hot and sweaty either. After a 12 hour shift sometimes, they will be damp. I wash them in the washing machine. I wear them out hunting too. Never had a problem. Another thing I do to stay warm in the blind, is I put one of those Coleman heaters under my chair. I have one of those camoflage foldout chairs you can buy at Wal-Mart. I get dressed up in all my duck killin camo parka thing, sit down in my chair, and put the heater underneath the front of the chair. Feels SO good. I fall asleep all the time in my blind. I love it. Matt