Is the EGOHOME 12 Inch Hybrid good for side sleepers?

Yes. The memory foam top layer cushions shoulders and hips, and the coil core keeps the medium feel from sinking too far. Heavier side sleepers may want a firmer model.

Does it need a box spring?

No. It works on a slatted frame, platform bed or adjustable base. A box spring is optional and mainly adds height.

How long until it fully expands?

Most mattresses in a box reach near-full height within 24 to 72 hours. Sleeping on it sooner is fine, though it may feel softer at first.

Is the full size big enough for two people?

A full is 54 by 75 inches, which is tight for two adults. It suits one sleeper or a guest room; couples usually prefer a queen.

Does the hybrid sleep hot?

The coil core allows more airflow than an all-foam mattress, but the memory foam surface can still trap heat. Hot sleepers should use breathable bedding.