RIO Powerflex Plus Tippet - 50yds - RIO Trout Tippet RIO’S Powerflex Plus Tippet is the strongest nylon tippet material ever made, with tensile strengths up to 20% more than regular tippet. RIO’S Powerflex Plus Tippet is the strongest nylon tippet material ever made, with tensile strengths up to 20% more than regular tippet.