To look like a sharp gent, make a brown blazer and dress pants your outfit choice. Dark brown derby shoes pull the getup together. You'll always look cool even despite the crazy heat if you have this ensemble in your front hall closet. So if you're looking for a modern and age-appropriate combination for a 20-year-old gentleman, this one is great.
Teaming a white dress shirt with dress pants is a smart idea for a smart and classy ensemble. Finishing with a pair of dark brown derby shoes is a guaranteed way to infuse a hint of stylish nonchalance into your outfit. Seeing as it's boiling hot outside, this getup seems perfect and entirely summer-appropriate. As you're going from your 20s to your 30s, you want to start dressing more like a grown gentleman. If that's the case, ensembles like this are ideal as inspiration.