Assert your will on tracks and treadmills in Under Armour Charged Assert 8 Trail Shoes. They're built with Charged Cushioning midsole, using compression-molded foam for even greater responsiveness and durability. So it lessens impact at the direct strike point and cushions through your stride. The rubber outsole is durable but lightweight and grooved for an easy stride. And a soft insole makes for a totally comfortable step.