The Travel N Trundle Toddler Featuring: Tall & Strong Sides Thick Mattress (1" overall) Quick & EasY Assembly Storage Pockets on Both Ends Heavier Duty Material Perfect for camping, sleepovers, overnight guests and for use as a transition bed after the crib. The bed assembles in seconds, is lightweight and comes with soft sheet. Mattress is 1" thick. Not for use for children under 2. Do not use on an adult bed.