Daybed Pop-up Trundles (Optional) The pop-up trundle folds down and rolls underneath the daybed when not in use and quickly rolls out and raises to create an additional twin sized sleeping area when needed. Together with the daybed the pop-up will create a king sized sleeping area.
Twin Mattress (Not Included) Your Pop-up and Linkspring each use a standard size twin mattress. The ideal mattress height for a daybed is 8" or less. Higher mattresses with sit too high on the daybed or have clearance problems when used with a pop-up unit. A standard twin mattress is 38" x 75".