How to Wear Summer Shorts–Spanish model Antonio Navas reunites with H&M for the summer as the brand releases a new style guide. Showcasing how to wear summer shorts, H&M unveils how to take the essentials from casual to chic. For a laid-back look, shorts can be paired with graphic t-shirts and short-sleeve button-downs. On the other hand, a great smart alternative is pairing cotton twill shorts with a crisp white dress shirt.