If you're on the hunt for a relaxed casual yet seriously stylish outfit, wear a white crew-neck t-shirt and charcoal jeans. Get a little creative on the shoe front and dress up your outfit by wearing beige suede tassel loafers. With rising temperatures come warmer days and more sunlight and the need for a light and breezy look just like this one. Semi-formal ensembles for stylish 30-year-olds aren't actually that hard.