SieviAir R4 Roller S1P str. 43

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BOA® Fit System fastening mechanism at the side adds to footwear comfort. The FlexEnergy® component, the world’s most advanced shock-absorbing heel, stores kinetic energy and gives a greater than 55% energy return. The SieviAir® sole dissipates the perspiration created by the heat of the feet through special ducts in the side of soles.