This smart casual combination of a white long sleeve shirt and black vertical striped dress pants is extremely easy to put together without a second thought, helping you look stylish and prepared for anything without spending a ton of time combing through your wardrobe. A trendy pair of black leather loafers is an easy way to bring a touch of polish to this ensemble. You'll always look nice even despite the summer heat if you have this look as a last-minute grab. A good illustration for any gentleman who wonders how to dress as a 30-something Millennial guy.