RIO's UniSpey has a powerful mid length head that is the most versatile of spey line designs, and that will cast long distances with ease. This UniSpey model has a VersiTip shooting head with a 20 ft long floating tip which, when removed, results in a powerful body that casts heavy sink tips with ease.
About Rio Fly Line Technologies:
Traditional, single-layer fly lines have to compromise between function and the need for durability and slickness. AgentX Technology makes the old compromise obsolete by bonding two separate coating layers onto one line.
This proprietary process allows RIO line designers to optimize the specific performance of each line. For example, AgentX floating lines can use an inner layer with more buoyant microspheres, while the outer layer is formulated for maximum toughness and shooting ability. AgentX means the best of both worlds in a single fly line.
Every fly fisherman is looking for a slicker line, and for good reason. Slicker line means longer casts, which is something all anglers strive to achieve. XS Technology is the latest development from RIO's lab coats that focuses on creating an ultra slick line, with dirt-repelling tendencies.
XS (Extreme Slickness) Technology began when RIO's chemists began reformulating conventional chemical combinations. Although RIO's formulas were great, our scientists are fly fishers, and by definition they want an even slicker fly line - it's just part of the deal. So first, they tackled the polyvinyl chloride (PVC) coating and through intense scrutiny down to the polymeric mix level, (say that 10 times fast) they defined some fundamental limitations. Out went the old PVC/silicone formulas and by methodically adding a little more of this, a little less of that, and a pinch of secret sauce, the lab coats cooked up a completely new and improved recipe.
With XS Technology, RIO has developed a fly line that is slicker, more stable, and far less apt to attract dirt, and paired with AgentX Technology, it engineers a line that is less dense, casts further and more accurately, floats higher, lasts longer, and offers more consistent performance cast after cast, strike after strike, fish after fish.