Looks like a shirt. Performs like a jacket. Don't let the fun plaid pattern and snap closures make you think this is a stay-inside shirt. The Smartwool Men's Anchor Line Shirt Jacket starts with 80% responsibly sourced Merino wool, so it can fend off all sorts of harsh conditions. Two secure chest pockets add function to the form. This hard-working 3-season essential likes to get outside and play, so get yours and get out there.FeaturesRelaxed fitClassic brushed wool fleece provides breathable warmth and modern stylePremium snap button closures at center front and cuffsTwo secure snap button chest pocketsBack vent at hem for added mobility75% Merino wool, 23% nylon, 2% other fibers