The WC cabin is designed to be resistant to damage caused by nature and by humans. The latter is designed to cope with a large amount of traffic and the wear and tear this generates.
They are made entirely of polished concrete with double-walled 15/10 insulated and lacquered steel doors. Seamless interior walls minimize damage due to the elements.
Lighting is provided by a fluorescent light located in the machine room, this is protected by a metal grill and a polycarbonate plate. Lastly, the fittings and taps are tamper-proof to minimize vandalism, the piping is only accessible from the machine room.