Combines the feeling of a racing flat, with the traction of a fully studded shoe. The perfect companion for all kinds of tough off trail running. Supportive but flexible, to allow the foot to move naturally. Molded protective areas on upper. Non-absorbing materials means minimum weight increase when wet (maximum 20%). Excellent grip with innovative diagonal ridge pattern, that is enhanced to amazing with integrated carbide tip studs. SPIRIT olx is developed for racing and high paced training in rough terrain, for orienteering, cross country and mountain running. If you're into natural running, this is definitely the most minimalist shoe available that will provide you traction for winter!