Having trouble picking that perfect jacket for your upcoming trip to somewhere chilly? It all basically boils down to just 2 factors: How cold it will be, and what you'll need it for.

Here's a chart done by from Real Men Style which organizes 20 of the most common & classic jackets a man may need.  The lightest and most casual coats in the top left, and moving down and to the right they become warmer and more formal.