Marina is wearing Aquazzura python shoes from the resort 2013 collection.
These shoes may be found at Moda Operandi in the same yellow color or in red too :
Yellow Amazon Lace Up Bootie / Red Amazon Lace Up Bootie
Marina was also wearing shoes by Aquazzura on a previous picture taken before the Christian Dior show :
She was then wearing the "Sexy Thing" cutout suede sandals, that you can now find in blue and with a python covered heel at Moda Operandi :
Sexy Thing Bootie
These "Sexy Thing" shoes from the new collection are sold at farfetch too through Browns, in black and blue :
AQUAZZURA "Mod Sexy Thing" Suede and Python Peep Toe Pumps / AQUAZZURA "Mod Sexy Thing" Suede and Python Peep Toe Pumps