Engineered mesh upper is extremely lightweight & breathable, with strategic support where you need it. Lightweight, external heel counter for additional support that keeps the back of the foot locked in place. Dual midsole combines Micro G® with Charged Cushioning® for the ultimate blend of comfort & energy return. Removable, comfort sockliner provides a comfortable & responsive ride. Solid rubber outsole covers high impact zones for greater durability with less weight.