adidas ClimaCool Adizero Feather III Mens Tennis Shoes Synthetic Breathable synthetic mesh upper with a mesh cage around the forefoot ClimaCool technology in the upper provides 360 degree ventilation for the entire foot keeping you cool and comfortable AdiPRENE+ insert in the forefoot maintains forefoot propulsion and efficiency whilst adiPRENE under the heel ensures superior cushioning at impact SPRINTFRAME construction offers maximum heel support while preventing pronation TORSION SYSTEM allows for midfoot integrity