A Valance is a type of top treatment. They can be used
on their own or over another window covering. Top treatments
offer both decorative and functional advantages. They
can make the window look larger than it is or conceal the
headrail of an under treatment. They are a nice way
of dressing up a window without obsructing the view.
However, with leather, you will need some way of protecting
your top treatment from the sun.