The GEL-RESOLUTION X tennis shoe creates advanced comfort for players who like to control the game from the baseline.. DYNALACING technology has been strategically designed to hold when extra support is needed. This allows you to experience a locked-in feel when you're making quick transitions. There's also a two-piece midsole design that helps improve stability when your foot lands on the court.. DYNAWALL technology in the midsole now extends into the heel for added stability during lateral movements. It's a functional feature that's effective when you're running covering both sides of the baseline.. Tech & Features:. PGUARD technology. Helps increase durability in the upper's forefoot inside area. DYNAWALL technology. Helps improve stability. DYNALACING technology. Helps create a stable fit during dynamic movements. AHARPLUS outsole rubber. Improves durability. Forefoot GEL technology. Improves impact absorption and creates a softer feeling at footstrike. Two-piece midsole design. Helps produce more stable landings. 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.