a friend works here
http://www.face-sud.com/no direct idea of the quality but on some pics i see they give you entry level "canyoning specific" shoes which is already quite good, the fall a lkittle above the standard in this regard
(the low end is no shoes, you bring your own.
the standard is to rent cheap, ordinary walking shoes with some ankle protection.
the high end is any proper sticky soled shoe with ankle protection, ie any mid top walking 5.10's.
the very top end would be sticky soled, canyoning specific shoes just like the ones the guide is wearing)