URGENT: Bit of help on routes would be appriciated

Is it possible to have multiple routes going to one page for example:

/products/:cat/:cat_name?/
This would filter the DB on ‘cat’

but then I would also like to do this on the same page
/products/:cat/:cat_name?/:subcat/
Which would filter the DB on ‘cat’ and ‘subcat’ on the same page.

Is this possible or is there a better way of doing this ?