Scientific Anglers Sharkskin technology is a precise texturing process that embosses the surface of the Scientific Anglers Sharkskin Fly Line coating with a repeating geometric micro-pattern. The finished surface is no longer smooth, no longer exhibits unwanted line flash, & can be optimized via the engineered shape, depth, & frequency of the pattern to yield greatly enhanced line-to-water floatation, casting performance, & overall line suppleness & durability.