The visibility of the line or its absence has always been a key factor in choosing a main line, followed by strength and casting properties. Shimano's Technium Invisitec integrates all three factors thanks to its Triple-Core technology, so there are no compromises to be made! For years, the Technium has been used by specimen hunters for its exceptional reliability, and now it is available in lighter breaking strains to meet the needs of all anglers. A monofilament line that is virtually invisible in water, helping it blend into any lakebed. The three-layer construction offers low stretch properties for better bite detection. Exceptional durability. Excellent casting properties. Sinks quickly and stays on the bottom. Loose spools are stored in a storage box.