[Sheba] Penny Mules demo

Ok, so i'm shopping for shoes, this is the second demo i'm trying since a long time buying shoes. Its the second demo i try that has a (hidden, in this case) ankle lock thing in it that has no instructions on how to turn it off, and isn't mentioned in the notecard included. Is this a new trend? Are we now putting ankle locks in shoes? If so, i'm not buying from you. could you like .. ehm... not? Why do these shoes need an ankle lock? And why can't i turn it off? I found the same thing with another merchant i just tried a demo from. If this is a new trend, don't follow it. Or allow me to turn that off. Thank you.