Definition of slickness and buoyancy: the XO fly line series! Experience a new level of precision and performance with the XO Fly Line Range, our flagship fly line family for 2025. Engineered with the latest Bolzi™ coating technology, these lines offer unmatched slickness and superior flotation, ensuring every cast glides effortlessly across the water. Bolzi™ is the latest and greatest new microsphere formula coating we have applied to our premium range XO fly lines. Bolzi™ offers the ultimate slickness ensuring a smooth run of the line in casting and high buoyancy, resulting in a high and steady floating of the fly line all the way to the tip. Together with the polyurethane based fly line, Bolzi™ technology offers long lasting constancy in variable weather conditions and an environmentally friendly choice compared to PVC lines. XO 150 is our most advanced long belly fly line. It has a 15m head and it is well suited for long casts and when overall control for both casting and fishing is needed. Coating is the latest and greatest Bolzi™ technology. Bolzi™ is the slickest coating we have ever used in our lines. It also floats better than any of our lines before. Tip is the most crucial part in a floating line as it has the least material. Bolzi™ ensures the tip floats really well when its new and more importantly even after its been used. Our new coating is also really stable for different conditions as some lines float better in certain circumstances and less in others. Bolzi™ floats in all circumstances. 15m head Slick and high floating Bolzi™ coating Floating, line weights #3 - #8 Small loops on both ends Clear markings of the line weight on the tip loop PVC free