This casual combination of a long sleeve t-shirt and a polo is super easy to put together in no time, helping you look dapper and ready for anything without spending a ton of time searching through your wardrobe. Now all you need is a pair of white leather low top sneakers. As you can see, it's very easy to look awesome and stay toasty when cooler weather hits, all thanks to ensembles like this one. Definitely a fail-safe option if we're talking outfit ideas for 40-something gents.