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.