As a part of the assembly process, you will put a piece of wood in place that creates an L shape at the head of the platform (closest to the wall cabinet). When the platform is raised to be stowed, this shape prevents your mattress from sliding off the platform. On the opposite side of the platform, we provide two straps that click in place and are tightened to hold the mattress in place. These straps will then simply be stowed under the mattress when the bed is in use, so they are unseen and out of the way. Shop now