This casual pairing of a grey blazer and a white horizontal striped crew-neck t-shirt is very easy to put together without a second thought, helping you look dapper and prepared for anything without spending a ton of time searching through your closet. If you want to effortlessly smarten up your getup with a pair of shoes, why not complement this outfit with burgundy leather derby shoes? Casual looks for stylish 40-something men aren't actually that hard, as you can see here.