One of the coolest ways for a man to style out a crew-neck t-shirt is to wear it with white chinos for a casual combo. A pair of low top sneakers looks awesome here. And if we're talking casualwear for 20-year-old gents, this ensemble looks cool on most men.
A crew-neck t-shirt and black chinos matched together are a perfect match. Low top sneakers will pull this whole ensemble together. Now that's how you dress casually at 20.
A crew-neck t-shirt and grey sweatpants married together are a nice match. Inject an extra dose of style into this look by finishing with low top sneakers. This getup demonstrates that as a young guy, you have a wide range of dressing options.
A crew-neck t-shirt and light blue jeans are the kind of a no-brainer casual ensemble that you so terribly need when you have no time. Look at how nice this look is finished off with low top sneakers. Wondering how to nail casual style as you progress through your 20s? This combo is a practical example.
This combination of a crew-neck t-shirt and light blue jeans is hard proof that a safe off-duty look doesn't have to be boring. Low top sneakers tie the look together. Casual looks for men in their 20s aren't actually that hard, as you see.