Go for a white sweater vest and navy jeans to assemble a cool and casual look. Avoid looking too formal by rounding off with white and black leather low top sneakers.
White Sweater Vest with Navy Jeans Casual Warm Weather Outfits For Men
Pair a white sweater vest with navy jeans if you wish to look sharp without making too much effort. If you're on the fence about how to finish off, a pair of tan suede casual boots is a good pick.