For me it sure is. I believe fleece offers twice the warmth of wool at half the weight. You can't beat that. Plus, it dries very quickly. Wool does not.

During last winter's cold snap when temperatures plunged to zero for a few days, I wore fleece, not wool. No regrets.

The only time I wear wool now is for dressier events. Wool still looks classier than fleece. If I'm dressing to impress, I bring out the wool sweater.

-- Craig