Fast summer hiking never looked as great as the sleek, lightweight X Ultra Mid Aero. Light enough to move as fast as you want, breathable, and with a supportive mid-height cut, this boot looks as fast as it feels. Ideal for fast hiking in warm climates, the X Ultra Mid Aero combines fit, precision, and aggressive tread of X Ultra, with breathability and mid-height support that make it great for even the most rugged trails. Open mesh and textile upper reduces weight and improves ventilation for warm weather hiking. These boots also feature: Contagrip non marking outsole, injected EVA and molded shank midsole, EVA shaped footbed and OrthoLite sockliner, textile lining material, and protective rubber toe cap. Material: Manmade, Textile.