How to wear short sleeves in summer is also outstanding?

I mainly design women's wear. If boys are in summer, my personal favorite clothes for boys are simple and casual, not too fancy, such as a simple solid color T-shirt with some simple prints, which can be looser, paired with sports shorts or overalls, which will look very sunny. Of course, boys who don't like patterns and are afraid of appearing childish can choose some stripes. As long as you don't wear too tight (personal feeling), if you are a literary boy, you can choose some fashionable shirts, which will give people an elegant feeling. Or you are the kind of boy with a strong figure, then you can choose some quick-drying short sleeves to exercise, which will definitely be too cool. This type of short sleeve suggests that you can choose something tight, so that your muscle lines will be displayed.