It may be feather light and downy soft, but there's nothing wimpy about the Klamath Range Half Zip. This pullover offers ample warmth, with a neck zip you can snug up to get toasty or unzip to ventilate. Columbia's patented Glacial microfleece insulates, breathes and dries quickly, making the Klamath Range an excellent layering piece for changing weather. thinkful details, like a zipper garage that spares beards and distinctive side and wrist panel seaming, combine to create a handsome fleece shirt that's as nice in the vineyards as in the wine bar afterward. Authentic fit.