King Koil

Otto Ultra Firm

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Overall

#426 in

Mattress

according to Reddit Icon Reddit

Sentiment score60% positive
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1
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Last updated: Jun 22, 2026

Reddit Reviews

Reddit IconCatacombSkeleton
11 months ago

Firmest mattresses I’ve tried so far was the Plank Luxe, King Koil Ultra firm otto, King Koil Ultra firm natural orchid, and Technogel. I forgot the model of the Technogel mattress unfortunately but all of these I compare to basically laying on the floor, in a good way. Worth mentioning but Avocado has a new mattress out that they describe as a 10/10 firmness and are marketing towards people who like that ultra firm feel and heavier individuals. It just came out in July but I’m curious about it.

Reddit IconHot_Combination2596
6 months ago

Just wrapped up mattress shopping. The firmest we found was Paramount Heavy Duty. They only make firm and extra firm mattresses. We ended up getting a King Koil tight top extra firm but they were the only brands we found that actually produced a truly firm mattress.

Reddit IconLaeliaCatt
6 months ago

I recently bought a mattress and I'm glad I went to some stores and tried them out first. I learned I don't like memory foam. I ended up getting a King Koil hybrid latex and I love it. It was expensive, but my back pain has almost completely disappeared so I'm not too mad about it. I found a few stores too that had examples of online bed in a box mattresses so you could try them first.

Reddit Iconmindfreck13
13 days ago

Bought a King Koil latex mattress for $3k. Less than 1 year, there was sagging in the middle.

Reddit Icongeekyyatri
5 months ago

I have been telling this for years, bought a super premium 12 inch foam mattress and I used to sink in it, the only saving grace was their return policy, went to the local market and got a spring pocket mattress from King Koil.

Reddit IconHopeful-ForEternity5
6 months ago

You don’t need to spend $10k. So you need to go try a few out; I recommend only trying 3 max on one trip. Personally, I go to Macy’s furniture gallery (the bigger the better) b/c they have a large selection of brands. Personally I have a king size King Koil and love it. Just remember 1. Ask them how long it has been on display. The longer it’s been out the more “broken in” it will be. So your new mattress will be a lot firmer (between 10-25% depending on how long the floor model has been in display). 2. Take your time and lay there for a while and in different positions. To ensure you’re well supported and comfortable. 3. Buying a mattress and finding one can be the most frustrating experience. That’s why I recommend to only try 3 per visit and also t

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Rankings by Use Case

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Individuals who toss and turn frequently, or couples who prioritize a mattress that is responsive and bouncy for sexual activity, and dislike the "sinking" feeling of memory foam.
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Best for Heavy & plus-size sleepers

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Individuals with higher body weights (typically 230 lbs or more) who find that standard mattresses quickly sag, lose support, and cause back or joint pain.
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Best for Hot sleepers

Purple - The Purple Mattress

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Individuals who consistently wake up feeling hot or sweaty, and find that their mattress absorbs and retains body heat throughout the night.
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Best for Long-term durability

Sleep EZ - Organic Latex Mattress

Ranked #1

Sleep EZ - Organic Latex Mattress

Buyers who view a mattress as a long-term investment and want to purchase one that will maintain its support and comfort for over a decade, prioritizing total cost of ownership over a low initial price.
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Best for Motion isolation for couples

Helix - Midnight Luxe

Ranked #1

Helix - Midnight Luxe

Couples or co-sleepers who are easily woken up by a partner's tossing, turning, or getting in and out of bed.
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Best for Natural & organic materials

Sleep EZ - Organic Latex Mattress

Ranked #1

Sleep EZ - Organic Latex Mattress

Health-conscious individuals or those with chemical sensitivities who want to avoid synthetic foams, chemical off-gassing, and potentially hazardous materials like fiberglass in their sleep environment.
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