Why not opt for a navy and red long sleeve shirt and navy jeans? Both items are totally comfortable and will look good when teamed together. For something more on the smart end to complete your getup, add casual boots to the equation. Keep the autumn blues at bay in a sharp ensemble like this one. As a 20-year-old going into your 30s, you'll love this combination.
A navy and red long sleeve shirt and navy chinos? This is easily a wearable getup that any man could work on a daily basis. Casual boots will give a touch of sophistication to an otherwise mostly dressed-down ensemble. Nothing like a kick-ass combination to brighten up a gloomy fall afternoon. So if you're looking for a stylish yet mature combination for a gentleman in his twenties, you found it.