A white horizontal striped long sleeve t-shirt and grey chinos are absolute menswear must-haves if you're picking out a casual closet that holds to the highest sartorial standards. Let your styling savvy truly shine by finishing off this look with a pair of white canvas low top sneakers. As you're transitioning from your 20s to your 30s, you probably want to start dressing like an adult. That's when combos like this come in useful.