If the setting calls for an effortlessly classic look, marry a black horizontal striped crew-neck t-shirt with a brown suit. Spruce up your getup with a pair of brown suede loafers. As a 30-year-old guy, you'll appreciate this look.
Black Horizontal Striped Crew-neck T-shirt with Brown Suede Loafers Warm Weather Outfits For Men In Their 30s