We have a winner, folks - Marmot Isotherm 1-2 Zip - Mens

i discovered the Marmot isotherm half-zip while shopping to replace the function of the venerable fleece sweater in my layering system. Did some research on the Polartec Alpha insulation and decided it would be worth a gamble. My greatest concern initially was durability, so I promptly wore it sans shell on a half-dozen or so chimney climbing pitches. Nearly a month of this, and it still looks pristine. It's easily as warm as the fleece it replaces, and breathes like a racehorse, so it remains comfortable as temps rise...and its only a third the weight of the old fleece. The only difficulty this presents is wondering whether I should have bought a second to throw in the closet against the day this one eventually wears out...

This review was written in the old system and had content requirements that are different than reviews written today.