I like the nightlife. I like to boogie. I like to wear hats made from Polartec Thermal Pro. It's a simple life, and the Mountain Hardwear Dome Perignon is a simple hat. In any case, it simply kept my brain bucket warm on Denali this year, so I'm sold.
Thermal Pro is a 200 weight fleece with a nice subtle waffle weave. Mmm. Waffles. The Gore Windstopper fleece earband keeps your flappers toasty, and an elastic section at the back stretches for optimal fit. Unlike some hats it comes in small, medium and large sizes so you can dial in the fit exactly where you want it.
There's just enough of a curve around the bottom to cover your ears, and the piping is a nice fat roll that makes it easy to pull on. Peak hats like this are more than just a random design. A little bit of air space up top facilitates moisture working its way out the top and evaporating, until those little drops of water are just so much vapor, like Sarah Palin's presidential chances.