For most anglers, you should swap out your lines once or twice a year. But the type of line—and where you store it—will also influence when a line should be swapped out. Mono lines are susceptible to damage from UV, so they should be stored in a dark place—and the lines are also less abrasive-resistant than others, which means you may need to replace mono lines more frequently. Co-poly lines are UV-resistant and come with a higher resistance to abrasion, which lengthens their shelf life. Braided lines aren’t as resistant to abrasion damage, but they do resist the impacts of UV and the use of higher-end materials boast a longer shelf life than mono or co-poly lines. Fluorocarbon lines can last longer than mono or co-poly lines. Anglers who prefer to fish in the ocean should also factor in the damaging impacts of saltwater on the line. Always inspect your line and look out for fraying, abrasion damage, a loss of stretch, or the influence of too much memory to know if you should swap lines before heading out.