Orthopedic Casting Tape providing stretchability which comprises a knitted fibrous substrate impregnated with a water-curable synthetic resin wherein the substrate consists of synthetic organic fiber stretch yarn solely, in part stretch yarn and in part natural fibers, in part stretch yarn and in part artificial fibers or in part stretch yarn and in part mixtures of natural and artificial fibers. 10 CMx360cm Orthopedic Casting Tape is made from fiberglass material used to replace plaster of paris bandage with the outstanding advantages.