Shop for Firm Mattresses

Firm mattresses have less give and provides a more solid feel. With a firmer sleeping surface and long lasting support, proper spinal alignment is achieved for a healthier night’s sleep.

All King Koil mattresses are designed and built in the USA since 1898.

Recommended for back and stomach sleepers.

Narrow your results

Athens Firm

What is Sleep iD?

Sleep iD is the result of extensive research between King Koil and the ICA. We have analyzed hundreds of people of all body types with varying sleep habits to learn which mattress construction properly supports different profiles of sleepers. You should try it!

Launch Sleep iD

Comfort Index

We understand finding the right comfort surface is a personal preference and may vary among retailers. To achieve the right feel for you, we suggest you determine your needed support through Sleep iD and rest test mattresses at your nearest King Koil dealer.