This casual combo of a shawl cardigan and grey chinos is a foolproof option when you need to look cool and casual in a flash. To bring some extra classiness to this look, complete your outfit with a pair of dark brown suede loafers. So when summer is done and autumn is settling in, this outfit has a good chance of becoming your number one. All in all, a great option if we're talking outfit ideas for men over 40.