The RIO Suppleflex Tippet is incredibly strong, with excellent knot strength and, as its name suggests, unbelievably soft and supple. A featherweight presentation does not impede the natural movement of a fly in the current. Available in 4X - 7X, the Suppleflex is the perfect choice for the trout angler fishing with smaller flies.Extremely supple, soft nylon. Ideal for trout, small flies and anytime you need a subtle presentation.