Excellent support for flaccid or weak extremities and helps immobilize painful extremities. The?Comfyprene Knee?offers the benefits of the Comfy Knee, but in slim line Comfyprene model. Patented malleable splint spine can bend to the desired ROM and the cuffs can be adjusted for optimal fit. Provide for gradual extension of the non-fixed knee contracture. Soft Neoprene in all Comfyprene.