What Our Gearhead(R) Experts Are Saying: "I've taken the Xodus Ultra 4 out for back-to-back long trail runs and was blown away by how well it handles varied terrain. It's soft, energetic, and stable with great grip. The combo of PWRRUN PB and the PWRRUN frame is ideal for ultra distances when your feet need everything." From daily dirt miles to full-on ultra races, the Saucony Xodus Ultra 4 Trail Running Shoe is built to go long. This high-cushion trail runner is powered by PWRRUN PB foam for responsive comfort and rebound that holds up deep into the miles. The broader platform and stabilizing PWRRUN frame offer structure and support on uneven ground, keeping the ride smooth and stable when fatigue sets in. The closed mesh upper protects against trail debris while allowing breathability on hot days or long climbs, and the newly updated PWRTRAC outsole provides tacky grip with 4mm lugs for multi-terrain traction. With a roomy fit through the midfoot and a forgiving yet secure feel, the Xodus Ultra 4 is built for serious trail time-whether that's technical climbs, dusty descents, or smooth stretches of singletrack.