Spinal stenosis is a degenerative condition often requiring surgical decompression to alleviate neural compression. However, traditional decompression techniques can exacerbate spinal instability, leading to long-term complications such as recurrent stenosis or postoperative back pain. Fusion surgery is often employed to address these issues but may be overly invasive, particularly for elderly patients with mild instability or osteoporosis. The SHLee Ligament™, composed of polyethylene terephthalate and approved by Korea’s Ministry of Food and Drug Safety, offers an innovative alternative. Designed for soft stabilization, this artificial ligament provides spinal support while preserving segmental motion, reducing the need for invasive fusion procedures. Its application is particularly suited for patients with mild instability or grade I degenerative spondylolisthesis, where maintaining spinal flexibility is critical. This chapter details the composition, surgical technique, and clinical outcomes associated with the SHLee Ligament™, emphasizing its effectiveness in stabilizing decompressed spinal segments. By integrating minimally invasive decompression with artificial ligament stabilization, this approach addresses the limitations of conventional methods, offering improved outcomes for patients with lumbar spinal stenosis. The SHLee Ligament™ represents a significant advancement in spine surgery, balancing stability and mobility while minimizing surgical invasiveness.