A light blue denim jacket and grey sweatpants are the kind of a no-brainer casual combo that you need when you have zero time to dress up. Finishing off with a pair of espadrilles is a surefire way to add some extra classiness to your outfit. Undoubtedly, it's easier to work through an extremely hot summer afternoon in a breezy combination such as this one. Relaxed casual outfits for stylish men in their 30s aren't actually that hard, as you can see here.