Size & Fit Guide The GEL-RESOLUTION 8 tennis shoe promotes a responsive stride with a close-to-the-court feel. The FLEXION FIT upper provides form-fitting support with the integration of DYNAWALL technology, which offers added midfoot stability during lateral movements and coast-to-coast coverage. Implementing a torque control feature in the heel counter, this shoe is also designed to help maintain a locked in feel during quick transitions. Renowned for its signature GEL technology in the heel and midfoot, this shoe significantly reduces the impact of shock from abrupt stop and go movements on court. Additionally, the model also incorporates an AHAR compound in the outsole that works in conjunction with the PGUARD toe protector to increase traction on court, while reducing the overall level of wear. Creating an accelerated response with a natural close-to-the-ground feel, the GEL-RESOLUTION 8 tennis shoe allows you to approach your matches on court with confidence. PGUARD toe protector DYNAWRAP construction FLEXION FIT upper AHAR outsole Rear and forefoot GEL technology DYNAWALL technology Removable sockliner.