Abstract: A bed mattress provides a zippered border attachment providing access to a hidden compartment on the interior of the mattress. The border may be completely or partially separable from the top mattress cover to allow inspection of the spring unit or to access the interior space of the mattress. In the all-around zipper construction of one preferred embodiment, the outer covers are pre-assembled without expensive machinery and allow a large inventory to be maintained comprising different mattress components. The hidden compartment preferably has its own zipper closure and may be formed to have two or more inner pockets. A pair of handles may be provided on the exterior of the border at about the ends of the pocket to overlap the pocket seams and help hide the presence of the compartment.