No matter how far your ride takes you - whether it's a commute or sunny adventure, wearing cycling specific shorts instead of regular/sport shorts will offer many advantages regardless of distance or terrain. So why will they benefit a rider? Whether cycling shorts are tight lycra or loose fitting, the are usually designed to be durable and flexible to suit the purpose, which is to stretch, be comfortable and stay in place as the rider pedals and the muscles expand. What you don't want are shorts that restrict your pedal stroke, bunching up as you ride, or worse still, pinching due to the inflexibility of the fabric.
Fox shorts are often made with the appropriate material technology for the season intended - whether downhill or trail riding. Fox shorts look as good as they perform.