The first thing to notice about HD2012 is the newest Flywire technology on the exterior side of the shoe. The Flywire construction allows to reduce weight of the shoe by placing the Nylon fiber only in strategic spots, right where it is needed. The exterior located technology also allows to place a huge breathable panel on the side, just beneath the Nylon. Whole construction is stable due to a external composite heel cup and a midfoot shank, which also provides a secure, anatomical fit. The cushioning is provided Lunarlon foam located in key places. The foam easily absorbs every impact and spreads its energy evenly throughout the whole area, which prevents muscle and joints injuries. The outsole features a special pattern which improves traction.