Very lightweight, water-repelling insulation material for additional thermal protection in the forefoot and toe area. Fischer Fresh puts an end to unpleasant odours, giving you lasting freshness inside the cross country skiing boot with a pleasant smell and feeling inside. Fastening for all popular gaiter models for additional protection against the snow and wet conditions. Internal anatomically shaped heel cap. Very light and individually thermoformable.Optimum support in difficult terrain. Reliable walking thanks to non-slip profile. Best Use : Cross Country Skiing. Boot and Binding Compatibility : NNN BC.