An electrical stimulation device comprises a stimulation lead with an adjustable length tension sleeve to prevent induction of an electrical current when the electrical stimulation device is in the presence of a magnetic field generated by a device such as an MRI machine. The tension sleeve is shaped to organize excess length of the stimulation lead while providing a variable length between a distal end of the stimulation lead and an electrical source. The shape of the tension sleeve avoids coils and may utilize combinations of straight and curved legs that lie substantially in a common plane to both organize excess length of the stimulation lead and prevent electrical induction.
