Flow is a simple design meant for fluid movement. Perfect for a seductive genital massage, the anodized aluminum on the Flow feels silky smooth as it glides in and out. Each end provides a different sensation and is fully interchangeable with other Alumina series parts for a toy tailored specifically to you. It's great for PC exercises and perfect for learning to relax the sphincter muscles. The Alumina toys also retain temperature. Run Flow under warm or cool water for an exciting exercise in temperature play.