The parts block noise and heat generated from the engine

They are covered by spare tire in consideration of outward aspect, and block noise generated form tire, muffler, et cetera.
The parts and installed at the storage placed backside of Rear Seat in RV or SUB vehicle, and they shield internal part of the storage as shade part is unfolded, As Shade part is unfolded, there are various mechanisms inside the parts, and they prevent exposure of internal part of storage and enhance the sense of design.