The core found in the GSP Floating Shooting Lines has a breaking strength of 65 pounds. The complete lack of stretch in these shooting lines, compounded with the strongest core available, translates the most subtle of takes back to the hand of the angler to virtually eliminate the chances of missing fish. This line is a favorite of spey fishermen.
Factory-welded loops are additionally reinforced to the point where the loop weld will actually outperform the core strength. This unmatched strength is critical at these high-stress locations. For the ease of changing out shooting heads, the forward loop is over-sized to accommodate large spools.
GSP Floating Shooting Lines are made with a Gel-spun polyethylene core and a specific blend of polyethylene polymers to create the coating. All of these materials begin lighter than water (Specific Gravity < 1.0). The buoyancy of this shooting line, combined with its natural tendency to repel water allows for long, effortless mends and easier pick ups so that you can keep the fly where you want it.
The polyethylene coating of Impact fly lines does not contain the volatile chemicals that must be added to PVC in order to create a fly line. This shift in technology is important to maintain the durability of the line. Previously, these chemicals would constantly migrate into the environment. This is why we steer away from PVC baby toys and food containers—they emit poison. As those chemicals migrate out of the plastic, a void is created in the compound. Not only does this alter the compound from its initial characteristics, but that void forces the compound to crack over time. This is where the circumferential cracks on a PVC fly line are born. Add dirt, oil, and other foreign debris to the cracks and performance degrades. Monic lines do not lose material over time, and therefore do not crack. This is important in the overall durability of the line and its performance longevity for the angler.