ASICS Gel Challenger 14 Mens Tennis Shoes - NavyType All Court Sole Non Marking Description; The GEL CHALLENGER 14 tennis shoe creates the stability you need when you're covering the baseline, so you can keep your mind focused on controlling the point. The shoe's supportive upper keeps your feet locked in on the shoe's platform. It creates a reinforced feel during volleys or when you're dropping back to track down deep lob shots. DYNAWING technology is placed in the sidewall to improve stability