Shop for Polypro sheets for O&P. Homopolymer polypropylene (Polypro) sheet for the O&P market is easily formed and widely used for body jackets, upper and lower extremity orthoses (especially AFO’s), and rigid outer prosthetic sockets. Custom cuts and cut-to-size pieces. Polypropylene comes in many colors and sizes. Stocked materials typically ship in 2-5 business days. Can’t find what you need? Get a quote.