A cast system, which includes: a padding layer configured to be disposed within a cast and support a portion of a patient's limb; a casting material which hardens around the padding layer and form an outer shell of the cast surrounding the patient's limb; and a wire saw configured to be disposed within the cast and extend along a longitudinal axis of the cast. The wire saw has a cutting surface which is at least partly enclosed by a plastic sheath. By enclosing the wire saw cutting surface in a plastic sheath, the saw does not lock up during the cutting operation, cutting is facilitated, allowing for easy and safe removal of the cast by pulling at least one end of the wire saw so as to cut through the outer shell of the cast.