The Cascade Flow Single Sheath – For those of you that like to keep it simple. This satin smooth silicone shaft is perfectly formed with a gently rounded crown making it ideal for external or internal stimulation. The powerful motor housed in the tip of the Cascade Vibe, and the Flow sheath with internal silicone dampening system, gives vibration only where you want, meaning you can stay in control, whist you lose control! For use with Cascade lubricating vibe. Cascade lubricating vibe sold separately.