The Mountain Hardwear Micro Dome is a lightweight fleece hat. A close-fitting layer of additional fuzz atop your head may be all that's needed when the day turns cool. Weighing only 1 ounce, this Mountain Hardwear hat will be sure to keep you warm in extreme temperatures. The Micro Dome, made of soft, highly compressible Velous Micro fleece, will hug your head and fit neatly under a climbing helmet. The Mountain Hardwear Micro Dome is the perfect stuff-it-in-your-pocket-and-take-it-everywhere cap.