Why not dress in a tan crew-neck t-shirt and jeans? As well as totally comfortable, these two pieces look cool when paired together. If you're hesitant about how to finish, add a pair of black leather low top sneakers to the equation. As you're progressing through your late 20s, you probably want to start dressing like an adult. In this case, ensembles like this are a never-failing option.
Tan Crew-neck T-shirt with Jeans Smart Casual Cold Weather Outfits For Men In Their 20s
To create a casual getup with a modernized spin, try pairing a tan crew-neck t-shirt with jeans. Opt for a pair of white canvas low top sneakers and you're all done and looking smashing. If you want to project maturity and professionalism as a gentleman in his twenties, an ensemble like this is what you're looking for.