ManmadeImportedSurface: Road. Differential: 12 mm. Breathable, flexible mesh and structurally supportive synthetic upper materials. Adjustable, asymmetrical mid-foot saddle creates a more secure, customizable fit. Lace-up closure. Plush tongue and collar. Comfortable fabric lining offers a great in-shoe feel. Removable molded foam insole supplies light underfoot cushioning. BioMoGo DNA has a gender-friendly cushioning design, making for a dynamic ride. Progressive Diagonal Rollbar?: tri-density midsoWith stellar cushioning and a more streamlined look, the Brooks? Adrenaline GTS 18 running shoe will have you ready to perform at your best!Predecessor: Adrenaline GTS 17.Support Type: Overpronation/Stability.Cushioning: High energizing cushioning.