What does the L3 designation mean in the World Class line?

It marks the third comfort level in the World Class lineup, a medium feel with a pillowtop. Higher levels add more surface foam and pressure-relief layers.

Is this mattress good for couples?

Yes. The 1000-density pocketed coils are designed to limit motion transfer, so a partner's movement is less noticeable. The medium pillowtop also gives each sleeper some cushioning.

Will the pillowtop sleep hot?

The quilted cover uses InfiniCool MAX vertical cooling fibers to move heat away from the surface. It helps, but it is not an active cooling system, so very hot sleepers may still notice warmth.

Does it need a box spring?

It works on a box spring, a platform bed or an adjustable base. A firm, supportive foundation is what matters; a sagging old box spring will shorten the mattress's life.

How firm is the medium feel?

It is a true medium: soft enough at the surface for side sleepers' shoulders and hips, with coil support underneath. Stomach sleepers and heavier sleepers often want something firmer.