Product details:

Prefer to go fast and light? You need a trail shoe that can keep up. With lightweight construction and a dual-density midsole, the Ultra Fastpack IV is up to the task. A woven mesh upper wraps your foot in breathable comfort, and a FutureLight waterproof-breathable membrane keeps feet dry when rain breaks out at the viewpoint. Grippy Vibram soles let you scramble across rugged terrain with ease. Woven mesh upper with TPU-overlays for durability without the weight. Welded midfoot underlays add support. FutureLight waterproof-breathable membrane keeps your feet dry and comfortable. Gusseted tongue keeps debris out. TPU toecap adds durability and toe protection, and a TPU heel overlay stabilizes the foot. Removable OrthoLite Hybrid footbed for underfoot comfort. Dual-density Fastfoam EVA midsole has softer EVA underfoot for high energy-return and cushioning, and stiffer EVA around the edges for longevity. ESS shank protects against underfoot impacts and adds torsional rigidity. Vibram Megagrip outsole sticks to whatever the trail throws at you.