A red and navy short sleeve shirt and skinny jeans are amazing menswear must-haves to add to your daily rotation. Flaunt your polished side by rounding off with blue suede loafers. Clearly, it's easier to work through an extremely hot summer afternoon in a breezy ensemble like this. As a man in his 30s, you probably want to start dressing maturely. That's when combos like this are a surefire option.