It is a small travel trailer ...only 17 ft long... all made out of aluminum and composite...no wood ...and very light (only 1650 pounds). The trailer has a retractable aluminum joint-free roof. Walls and roof are built using a plastic honeycomb sandwich core. The roof is laminated with aluminum skin on one side and Alufiber skin on the otherside. Walls have an aluminum skin on both sides. It is fully autonomous with solar panels that provide sufficient electricity to our convenience including running the microwave. The model is an Alto manufactured by Safari Condo - bought in June 2011.