One of the coolest ways for a man to style a brown cardigan is to team it with a white polo in a casual outfit. For a more casual aesthetic, complete your ensemble with a pair of white leather low top sneakers.
White Polo with Brown Cardigan Outfits For Men
If you love classic pairings, then you'll like this pairing of a brown cardigan and a white polo. Introduce a pair of dark brown suede low top sneakers to the equation to avoid looking overdressed.