These shorts are made with Nike's signature Dri-FIT fabric which is designed specifically to wick sweat away from your body, then push it to the surface of the shorts where it can then evaporate at an incredibly rapid rate. This type of fabric also acts as a type of ventilation system as well, so altogether, the Dri-FIT fabric will not only keep you dry and comfortable, but it will also help keep you cool while dominating the court. The Nike Fly Men's Shorts are also equipped with a new and improved rectangular action gusset and motion vent at the hem to allow air to flow in and out while you move, keeping you at a comfortable temperature always.