The Edea power wedge is recommended by the Edea and www.rollerskateusa.com to be installed
between the curved skating boot and the flat of the roller frame, to keep the foot in its natural position.
The big advantage of the EDEA power wedge is that it provides a very secure contact between boot and frame.
PS: When installing the Power Wedge, the side with the Hollow goes towards the Frame and the smooth side mounts towards the Boot. The divot is for the Toe Stop, should it be fully retracted into the Frame.