The Ultra Low Friction Sheath, or ULFS, is a concept in sheaths designed to address problems and improve function for amputees where the coefficient of friction presents a problem in donning, for sockets or prosthetic shrinkers, and the socket design does not incorporate the use of a pull sock.
Donning problems addressed include proximal bunching of socks as plies are added, adductor rolls and proximally directed pressure on soft tissue, “


Another benefit provided with the ULFS ultra-low coefficient of friction is that more socks can be applied to the residual limb before donning, thus providing increased soft tissue compression. This results in better socket stabilization, greater security, increased proprioception, and often improved suspension and reduced pistoning. –


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