The structure (I believe) is wood and very cheap/thin. I guess not necessarily the most surprising since it's such an affordable accommodation. But, I was pretty surprised that you could hear every weight change in the floor above us, or even in the hallway when my family was moving around. Was too noisy to sleep and had to use noise-cancelling headphones. Otherwise the hotel is clean, room was spacious, bed very comfortable, excellent breakfast, and great location.