adidas Vigor TR 4 - Boys' Preschool The adidas Vigor TR 4 trail running shoe returns with an updated midsole/outsole for more aggressive traction, helping you take over the trails with force. Highlighted with TraXion™ rubber outsole, it delivers aggressive traction that's sure to challenge the wildest terrain. Great for outdoor running, the mesh upper increases natural airflow to keep your feet cool and dry. Molded EVA sockliner reduces foot slippage while increasing wearing comfort. AdiPRENE® midsole cushions step and absorbs shock so you can smoothly step on and over the roughest terrain.