Sivaoans made them they were made to repel water, and quite strong. They were made for: * Bridge crossing, during the Walk the first contact team had to cross a raging river. Halfway across a large object muddy water, in the fast moving along filled with runoff from the thunderstorms that passed that point upstream, * Traveling tents along with ties either on the ground or in a tree, Also the Walk it was made into a map, which got lost during the crossing of the river. They were quite versatile.