Eight layer, polyester knit substrate molds easily and is fiberglass free. Lightweight and strong; possesses the strength of fiberglass without sharp edges. Felt outer padding wicks moisture away from patients skin and eliminates any need for pre-padding. Easy to cut and provides excellent x-ray radiolucency. Sizing is easy; five different widths are available in 15 ft. rolls. Continuous foil protective pouch keeps PolyPROSPLINT fresh. Sealing clip ensures long shelf life even after the roll has been opened.