Stokke Sleepi Bed Extension V3 with MattressThe bed that grows with your child. Prolong the use of your Stokke Sleepi Mini V3 with the Stokke Sleepi Bed Extension V3, expanding their sleep surface from 76cm to 137cm long to accommodate them all the way up to five years old. After extension (just like the Sleepi Mini) the Sleepi Bed features a height adjustable mattress base with the addition of a removable side to grant them more freedom once theyre able to get out of bed independently. The