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Freeclimber always have to compromise when choosing the right footwear: their shoes have to be worked up very thin to feel the slightest rock with the result that there is less room for protective and supportive elements. This fact often leads to an extraordinary exposure of feet during longer sport activities. Impulse with its intelligent material D3o combines security and flexibility it reacts to his changing environment. The material hardens when colliding and absorbs the shock energy, the foot remains unharmed. Afterwards the material is soft and flexible again.