Is a 12-inch gel memory foam mattress good for back pain?

It depends on your weight and sleeping position. The plush top cushions pressure points, but heavier back sleepers may want a firmer or hybrid bed with more support.

Does the gel layer really keep it cool?

Gel infusion helps compared with plain memory foam, but an all-foam bed still traps more heat than a coil or latex mattress. Hot sleepers should pair it with breathable bedding.

How firm is this mattress?

It is described as plush, so expect a soft, sink-in feel rather than a medium-firm bed. Side sleepers usually like it; stomach sleepers often find it too soft.

Does it need a box spring?

No. A 12-inch foam mattress can go on a slatted bed frame, platform base or adjustable base. A solid or closely spaced slat base gives the foam the support it needs.

How long does it take to expand after unboxing?

Most foam mattresses in this class reach full height within 24 to 72 hours. Some residual odor is common right after unboxing and fades within a few days.

Is it good for couples?

Yes for motion isolation, since foam absorbs movement. The soft edges are the trade-off, so sitting on the side of the bed feels less stable than on a hybrid.