Dress in a navy zip neck sweater and navy chinos for relaxed dressing with a modern finish. Rounding off with white canvas low top sneakers is a guaranteed way to inject an air of stylish casualness into this look. If you want people to see maturity in you as a 20-something gent, a look like this is what you're looking for.
A navy zip neck sweater and grey wool chinos are veritable menswear staples if you're planning a casual wardrobe that matches up to the highest sartorial standards. White canvas low top sneakers are the simplest way to punch up your getup. This combination demonstrates how 20-something gentlemen kill in the fashion department.