Is a 12-inch hybrid thick enough for a heavy sleeper?

Twelve inches is a common hybrid height and gives a thick foam layer over the coils. Very heavy sleepers may still want a denser or firmer model for longer support.

How firm is the medium feel?

It sits in the middle: soft enough to cushion shoulders and hips, firm enough to keep the spine fairly level. Stomach sleepers often want something firmer.

Does the memory foam sleep hot?

Memory foam tends to trap heat, though the coil layer under it helps air move. There is no gel infusion or cooling cover, so hot sleepers should weigh that.

Does it work on an adjustable base?

A hybrid with coils can bend on an adjustable base, but check the retailer's guidance for this model before pairing it. All-foam beds are the safer choice for heavy flexing.

What is included with the mattress?

It is sold as the mattress itself, so a foundation, box spring or frame is separate. Confirm whether the retailer includes a foundation before ordering.