Mastery Textured GPX lines feature the Scientific Anglers proprietary textured coating, which provides maximum shootability without the abrasive qualities of Sharkskin lines.   The forward portion of the head is treated with Dry Tip Technology to be extra high floating.  The GPX Taper is our most versatile and popular trout taper.  For most anglers, the amount of texture in the "Textured" line optimizes performance without any of the reservations held against the extra aggressive Sharkskin line.