XP-1 RT™ was built to be a true jack-of-all-trades. We crafted it to excel as a runner, trainer, trail and daily shoe. It features a breathable, stretch knit upper that fits like a sock with ample flexibility and improved stability. The knit encourages maximum airflow to keep your feet cool and dry. Plus, the lacing system is built to adapt to many foot shapes. The sole provides ample traction across a variety of surfaces and an anti-slip heel design for extra stability. The midsole offers neutral support using a mix of EVA material for the perfect blend of cushioning and responsiveness. And, a soft, high-density foam lines the heel and tongue to add extra cushioning and support.