An extra-firm mattress makes a difference in your alignment and sleep quality. Our picks for the best extra-firm mattresses include Plank Firm, Titan Plus and others.

This reputable online brand makes several quality beds, but the Plus Hybrid might be its most durable and supportive one.

In fact, some of the firmest mattresses are comprised of foam, including the ultra-firm Plank Firm mattress. Go here for more information about the best memory foam mattresses. Read on for our top ...

It’s our top pick in our best-mattress roundup because it offers ... the firmest on the market — and discovered that the “ultra firm” side was, in fact, the firmest memory-foam model ...

So, you’re on a hunt for the best mattress-in-a-box ... chose to try out the mattress in the extra firm option. Though I can confirm the bed is ultra-supportive, it still feels comforting ...

The best mattress brands even offer 25-year ... both sides of the mattress ranging from firm, cushion-firm, medium, medium, plush, and ultra-plush, so this is an ideal selection for couples ...

Nectar beds are actually available in many Mattress Firm locations across the ... the cooling nature of the Nectar Ultra a few times now and it's the best-performing Nectar mattress in this ...

For people who know they love an ultra plush ... an affordable innerspring mattress. We like these six medium-firm mattresses best for stomach-sleepers because they’ll support and cushion ...

Mattress Firm is the place to look. The sleep retailer stocks a wide selection of the best mattresses from editor-favorite brands like Purple, Nextar, DreamCloud, and more. Plus, it can be pretty ...

(Related: Best pillows for every sleeper) What types of mattresses should stomach sleepers look for online? Stomach sleepers will most likely find a firm or ultra-firm mattress the most comfortable.

this mattress is best for combination sleepers. She adds that it could work for back sleepers who don’t need a firm mattress and side sleepers who don’t prefer an ultra-fluffy, cloudlike mattress.