Grey sport coats can be tricky. One misstep and your sport coat can easily look like an orphaned suit jacket – something you pulled out of your closet, but forgot to take the matching pants. A safe option, however, is the reliable grey tweed, particularly something in a speckled wool or chunky herringbone. In the above photos, No Man Walks Alone writer William Phips shows how to combine a grey tweed in any number of ways – from “old British dude” style to American trad to something he calls “substitute teacher.” You can check it out here.