Mastiff is Shimano's new fluorocarbon line specifically designed to meet the demands of bass anglers worldwide. Made from high-quality materials that have been tested and verified over a long period of time, Mastiff is known for its exceptional strength and durability, perfect for handling big fish in tough conditions.

 One of the key features of Mastiff is its low linear elongation, which allows anglers to feel even the slightest pecking or disturbance on the line. This attribute is important for detecting bites, allowing the angler to set the hook quickly and effectively.

 Mastiff is also wear-resistant, making it ideal for use in thick cover. The line possesses a supple feel making it easy to cast and control. Mastiff delivers smooth, responsive performance that anglers can rely on.

In addition to being smooth and supple, Mastiff possesses superior binding strength compared to other fluorocarbon lines. While the surface is completely smooth running parallel to the length of the line, Shimano engineers devised a unique nano-surface processing technology called NANOARMOR®, which creates ridges across the outer surface of the line so slight they’re undetectable by human fingertips or eyes. 

 This extremely fine application of concave and convex textures on the outermost layer of the line helps prevent knot-slipping when fighting large fish. Similarly, this minimizes slippage and breakage when using common bass angling techniques like twitching, jerking, and casting large lures. 

 The concavo-convex NANOARMOR® layer interacting with the overall smoothness of the surface creates a fluorocarbon line with enhanced binding strength. This makes Mastiff an ideal choice for use in all bass angling situations.