I had brain surgery with metal in my skull and work outside> The beanie is thick and warm on its own and the heating coils keep my head warm working in below freezing temps for 3+ hrs. Helps a lot
My wife loves the hat and other heated garments ordered for her
My husband bought this hat, along with heated gloves and a vest, before traveling to South Bend for a Notre Dame game. The temperature in the stadium during the game was in the low 30s but he says he was toasty warm throughout. Now he wears the hat and gloves when he takes a nightly walk in our neighborhood, in similar low temperatures, and has been very pleased with the product so far.
I ordered this for my wife and she absolutely loves it.
This beanie keeps my bald head warm and toasty in the early mornings at the beach where its cold and humidity gets deep inside your bones. I love it cause it covers and keeps my ears warm which is most important of all. There are three settings, high, medium, and low. My initial beanie came without a charger and it did not work. I contacted the mfg and they were kind of enough to rush me out a replacement that included a charger. It's rather expensive but I look it at this way, I rather keep my head and ears warm than risk getting sick. To me, that's worth a lot more than the cost of this hat.
Bought this for my Star Rank Boy Scout to use for outdoor camping in October/November and he remained very warm during the cold nights.