webril ii undercast padding is constructed of 100% cotton fibers with crimped finish for extra loft and conformability. it is ideal for use with synthetic and plaster casting material. processed to minimize bulk and dimensional changes that lead to movement of padding under cast. this undercast padding retains consistency; wet and/or dry product will not collapse as padding absorbs moisture. webril ii offers the shortest fibers for a hook-and-loop effect that prevents pressure points, and combination of mild stretch and cohesiveness holds padding in place without shifting or bunching.