This is by far the best winter hat I've ever worn and it just so happens to be FR. This is better than any other FR hat or hardhat liner I've used in 17 years as a Lineman. Still good at -25 F, and slim enough to fit under your hard hat. I have one for work and one for play, can't say enough good about these hats.

[This review was collected as part of a promotion.] Its a very warm hat it has a very warm liner, God knows I have needed it the past week with temps between 10 and 20 degrees. I would recommend drying it after washing on Hot it will shrink the hat a little bit. Another A+ product :)

N-Ferno knit cap is the best winter cap that I own. I love the double layers and the fleece lining keeps me really warm these past couple weeks here in Chicago. I definitely recommend this cap to anyone who wants to stay warm and still needs to be FR compliant on there job site. I did find it to be a little big but when I washed and dried it it fit much better.