The new ShocAir boots represent the very latest in cross-country protection in design, combining the latest advances in material and fabric development. These specialized protectors are designed to withstand the rigors of cross-country. Ventilated EVA technology provides powerful airflow to the outer shell. Although optimal protection against impacts is provided by a new impact-sensitive smartlayer between the tendon and the outer layer. This smart Shoc layer is composed of impact-sensitive material that contains free molecules that remain supple and flexible when not under pressure. At the moment of impact, the molecules activate and lock together, forming a hard, protective shock-absorbing barrier and only returning to a flexible state when the pressure is released. The forward-facing outer vents and inner 3D mesh lining optimize breathability. Completed with a soft stretch cotton inner lining for comfort and helps prevent friction.