 An analysis made in 1992 by the Forest Sciences faculty of the Swedish University of Agricultural Sciences showed that the skis were made from pine that had grown in a slope, causing the wood to become denser than ordinary.This shows good craftmansship, since this type of wood has been favoured by ski makers in more recent times as well.Each ski had four holes for the bindings, which corresponds well with ancient skis found in Siberia, but not typical of other skis found in Scandinavia.