Trailer Covers-will that eliminate condensation inside ?

I saw a Trailer cover offered. Seems to cover quite nicely a standard Cobra trailer. Color is white.
I wonder if this a solution to reduce or eliminate formation of condensation inside the trailer walls, especially metal ones.
I would assume that since the top and side walls are somewhat insulated they will cool down slow enough at night so that dew will not form on them.
What do you guys think ?
Dan