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 during side-to-side movements. This feature offers good support, so you can step into your shot and stroke the ball with more pace.​ The outsole also features a separated heel construction to help you experience better stability during abrupt landings. PRODUCT FEATURES PGUARD™ toe protector Improves durability OrthoLite™ sockliner Provides soft step-in comfort DYNAWING™ technology Improves stability AHARPLUS™ outsole Improves durability Rearfoot GEL™ technology Improves impact absorption and creates a softer feeling at footstrike The sockliner is produced with the solution dyeing process that reduces water usage by approximately 33% and carbon emissions by approximately 45% compared to the conventional dyeing technology.