“I purchased the socks last year and wear them at least three times a week in winter months walking my dog, showshoeing, skiing, mountain biking, etc. I have raynaulds syndrome and these work very well- no more numb toes! So happy that they are still working this winter. The batteries are starting to run down faster but I get at least 6-8 hours before recharging them. I never use them on the highest setting, they get a little too warm. Highly recommend!”