In most of Iceland’s mountain huts, it is not possible to buy hot food or drinks, so you should bring your own food with you. You also need to bring your own sleeping bag and most have a bunk bed set up in shared dorm-style rooms. In most huts, you can’t leave any rubbish and need to take all trash with you and it is generally good etiquette to leave your muddy hiking boots at the door and wear socks inside.