We herein describe a simple method for the fine length adjustment of expanded polytetrafluoroethylene (e-PTFE) using the loop technique for mitral valve repair. The loops are temporarily anchored to the mitral leaflet with a second e-PTFE suture by tying only once (one-knot technique). This anchor suture can be easily removed and repositioned if necessary. We believe that this simple technique allows for the more precise and reproducible repair of mitral valve prolapse.