Suitable for casting in large rivers. In all cases, successful Spey-Casting requires fine line control & splitsecond timing. The amount of line exposed to the rear of the caster is also of paramount importance. The Snowbee development team has tackled this situation head-on & produced the Snowbee 3D Spey Lines (73ft Head) that are perfectly balanced for Spey-Casting in just about any river environment.