Brooks Mens Adrenaline ASR 13 Synthetic Abandon the city for a run on the wild side in the Brooks&reg; Adrenaline ASR 13 trail-running shoe! Predecessor: Adrenaline ASR 12. Support Type: Overpronation/Stability. Cushioning: High energizing cushioning. Surface: Trail. Differential: 12 mm. Durable, DWR (durable water repellent) mesh and synthetic upper materials. Mid-foot saddle with adjustable eyelets pulls from the heel for a more secure fit. Lace-up closure. Plush tongue and collar. Soft fabric lining. Removable foam insole. BioMoGo DNA is a blend of earth-friendly BioMoGo and responsive Brooks DNA, and has a gender-friendly cushioning design, making for a dynamic ride. Progressive Diagonal Rollbar&reg; (PDRB) is a tri-density midsole t