"Marathon runners use up to 97% of their energy for temperature regulation." Professor Winfred Joch, Institute of Sports Science at the University of Munster in conjunction with Dr Sandra Uckert, University of Dortmund.

Nature has developed ways of surviving in some of the most hostile climates on the planet. The desert fox or fennec (vulpes zerda) is perfectly adapted to life in the desert. Its bright silver colour and the special structure of its coat allow it to reflect the heat of the desert sun. Radiated heat is reflected by the fox's thick coat, preventing its body from overheating. The X-Bionic Team researchers have used the same principles in X-Bionic Fennec and developed the system even further.

During Sport
Perspiration forms a fine film of moisture on the skin. Droplets are caught in Sweat Traps and directed to the Evaporation Surface Expander. Evaporation activated by body warmth occurs on three levels:

• On the skin, for cooling
• In the SweatTraps, to process excess moisture
• In the Evaporation Surface Expander for final evaporation of the surplus

During Rest Periods
Cold ambient air is no longer a risk factor for cooling out as the Inner-Air Channels form an insulation cushion from the warmed air. During rest periods no perspiration is produced and the cooling process is interrupted. The air then protects and warms in both channels, which creates a body aura from the body warmth - an air conditioned protective cover, which insulates you from the cold.