3M Healthcare Synthetic Cast Stockinet 4" x 25 yds, Smooth, Latex-free 3M Healthcare Synthetic Cast Stockinet is a fine knit, ribbed polyester stockinette that is an ideal component of a high-quality cast. It offers optimum coverage and conformability and is intended for use as an underlayment for all standard casting applications. Suitable for use with all casting materials, plaster of paris and synthetic. Also ideal for unpadded application with synthetic semi-rigid materials. 3M Synthetic Cast Stockinet is Latex-free. Stockinet helps reduce water retention and improves patient comfort. 100% knitted polyester stockinet provides conformability for easy use. Smooth, strong, versatile and skin friendly. Ribbed knit conforms to needs.