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: ASICS' pinnacle high abrasion resistant rubber located in the heel area that is approximately three times more durable than standard outsole rubbers Forefoot GEL technology: Shock-attenuating material placed in the midsole of the shoe for cushioning and shock absorption The GEL-RESOLUTION X NIGHT ENERGY tennis shoe creates advanced comfort for players who like to control the game from the baseline. ​It's rendered with a primarily black color palette that's offset with prism blue accents for contrast. 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.