The Harmony Daybed is a perfect space-saving bed for your guests, your child's room or anywhere you need more sleeping space! Constructed from Brazilian Pine, our furniture is meant to be stylish and durable. This bed requires two twin-size mattresses, not included. The two mattresses stack on top of each other while the bed is in twin-position. We suggest two twin mattresses that are 4-6"H so that some of the bed frame will still show. When you pull-out the bed you will slide one mattress over to the extended side and the bed will be level to a king-size; a unique style of a trundle bed. The drawers will also extend so you can still access them.