Plan on having sleepovers but don't have the space for an extra bed? The Perch Trundle Bed gives you that extra bed and only uses the space when you need it. Of course, it can be used for storage, too. The trundle comes with a replacement ladder for the bunk bed. It hangs vertically so it doesn't interfere with the use of the trundle. No additional purchase necessary. Special mattress size required 38" x 69 x 4 1/2". Mattress sold separately. Greenguard Gold certified.