Does a full size mattress fit in a toyota highlander?

If You are wondering what size mattress will fit in a Toyota Highlander, I can help You with that information. A twin sized mattress will be able to fit on the Toyota Highlander if You were to fold down the second row of seats. You would be able to fit it all the way to the firSTSeats comfortably. Any mattress bigger than a twin will not be able to fit on this vehicle without becoming damaged. Your best bet is to tie a larger sized mattress to the top of the vehicle if it happens to be larger than a twin size.