I am a professional photographer who photographs a lot of sports. From August to Janurary I spend a LOT of time in cold hockey rinks. For the previous 10 years I've had to wear additional clothing (not very flexible) to at least not be frozen. My wife bought me the Ororo heated vest and it has been an absolute game changer. Even without it being turned on, the quality of the vest with the FELLEX insulation is top notch at retaining the body heat. The vest heating is very efficient and in conjunction with the FELLEX insulation, I typically only have to have the power turned on to low. At some point I would like to get the had warmer and pants to test. I would, and have recommended this to all my friends and I know many of them have become happy Ororo owners as well.