Hi-Seas Grand Slam leader is perfect for both fresh and salt water. Grand Slam leader is equally at home bottom fishing in the bay to blue water trolling for tuna, wahoo, and marlin. It is an advanced monofilament polymer extruded to be both supple yet extra tough. It's a perfect monofilament for making rigs for everything from flounder to deep dropping for monster grouper. Grand Slam leader is also perfect for running all your favorite offshore trolling lures!