BERKLEY Trilene XL 30lb 250yd Clear XLFS30-15 The monofilament Trilene XL line by Berkley is perfectly designed for smooth casting. This line resists twists and kinks and provides sensitive to feel structure and strikes. This Berkley line also has incredible strength for confidence and control. Ultimately the Trilene XL smooth casting line is versatile for use with a wide variety of baits and techniques.