You may well want to look at getting a Mazda boot liner, they are heavy material and easy to clean.
Also if you have not got a board over the spare wheel place. Wheel fitted or not. A piece of M.D.F
will stiffen the present boot lining,which if like mine it just covers the gap where the spare wheel
would go. Hope that helps a little. New sets of floor mats, if needed, can be obtained via the net at
reasonable prices and seem to fit well.