Frog Hair proved to be an exceptionally strong and produced some of the loudest tippet “pops” when the material broke finally snapped. Frog Hair had the strongest 4X in our test, (while still measuring very close to the industry standard). Once we included the 2X and 6X average diameters however, it did run somewhat oversize compared to other brands. Frog Hair is one of the harder nylons that we tested, which lends itself well to accurate casting and better than average abrasion resistance, we just wish it was a little more consistent with knot stength.