Is a 5-inch mattress thick enough for an adult?

It works for lighter adults and occasional use, but most adults sleep better on 8 inches or more of foam. At 5 inches the TrueZen is best treated as a kids', guest or bunk mattress.

Does the pocket spring base make it firmer than all-foam mattresses?

Yes. The springs add support and a little bounce under the memory foam, so it feels firmer and less sink-in than a plain foam slab of the same height.

Will the cooling foam keep a hot sleeper cool?

It helps compared with standard memory foam, but a 5-inch mattress has little room for airflow. Hot sleepers should still expect some warmth.

What sizes and heights does the TrueZen come in?

This listing is the twin at 5 inches. EGOHOME sells the TrueZen line in other sizes and thicker versions, so check the model name before ordering.

Does it need a box spring?

No. It can go on a slatted frame, platform bed or bunk base. A solid, supportive base matters more than a box spring at this thickness.

Is it safe for a child's room?

The materials carry OEKO-TEX certification, which tests for harmful substances. That makes it a reasonable choice for a kid's bed, though firmness should still suit the child.