The material used in this soffit application is clear anodized aluminum to match the fascia as well as the aluminum window system. We believe less is more and try to limit our pallet of materials to create a more cohesive, visually calmer aesthetic. We do however use wood in exterior soffits often, making sure it is protected from the elements - sun and water. We have homes in Arizona with this detail that are nearing 20 years old with minimal to no maintenance needed on the wood soffits. We do always recommend against using wood as a siding here in the desert where it will take direct impact from sun and rain. Those who do use exposed wood in an exposed application will inevitably incur thousands of dollars of required maintenance, which we try to help our clients avoid.

Thank you so much for the quick response and information.