This amazing daybed is a true space-saver! With its unique same-height pull-out trundle the bed extends from a twin-size to a king-size day bed. The bed also includes two storage drawers that can be accessed when the bed is not extended or when extended. We suggest two 6-8"H mattresses for this bed; stack the two mattresses until you need to extend it. When more sleeping space is needed move one mattress over to the extended side. You will enjoy the versatility of this bed for years to come! Product Details Bed Size: Twin Frame Material: Solid + Manufactured Wood Mattress Included: No Slats Included: Yes Adult Assembly Required: Yes Trundle Bed Included Trundle Bed Included: Yes Trundle Mattress Size Compatibility: Twin