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. Smartwool's Men's Anchor Line Shirt Jacket starts with 80% Merino wool, so it can fend off all sorts of harsh conditions. Two secure chest pockets add function to the form. This hard working, three-season essential likes to get outside and play, so get yours and get out there.