For patients with lumbar discomfort, it is often necessary to add steel or resin strips after the waist protection to fix the body shape, reduce bending and relieve pain. However, this batten must be strong and flexible! In this sense, high-quality resin lath has better effect than ordinary steel lath due to its flexibility and flexibility. Only by being flexible and flexible can you correct the bending of the waist and back, and restore the upright posture without pain or cramping.