The coil springs used in most supporting box springs are approximately 3” in diameter. Although many more pocket coils are used in the Rossa™ and Stella™ than are used in other mattresses, their diameter is closer to 1 1/4”. What this means is that to prevent the pocket coils from resting on an unsupported space, our SFL™ is required on all box springs and on wood slat foundations with spacing between the slats greater than 1”.
These mattresses can also be used on wood-slat bed frames, as long as the distance between slats is no more than 1” and the slats are padded (even an old blanket should work, depending on its thickness). Please contact your local retailer if you have any questions regarding an appropriate support system for your mattress.