From on the road to off road, and back on the road again, the Brooks Adrenaline ASR 9 trail running shoe is like an SUV for your feet. Moisture managing Element™ air mesh linings, water resistant material package, hydrophobic foam package, internal support saddle. Rearfoot HydroFlow® ST, forefoot HydroFlow®, full-length BioMoGo. Progressive Diagonal Rollbar (PDRB®), Dual-density DRB™ Accel. Combination S-257™ cushsole, HPR Green, HPR. Forefoot Stable-Pod construction. Wt. 9.5 oz.