Wool Blazer

General Assembly Holiday Tweed Blazer
Buy It Now at Karmaloop
, $133

A navy blazer is an indispensable part of any guy's wardrobe. Whether with a pair of chinos, jeans, or proper trousers, it's like the white tee of sportcoats. You're not Mitt Romney, and you don't own a yacht (your boss however...), so you don't need the nautical-inspired gold buttons. This version from General Assembly features a tonal herringbone tweed pattern and a slim, tailored fit. It's a welcome staple to any guy's closet. If the artist formerly known as Mos Def says you need one, then you need one.