Sleeping Duck Mattress Firm King
Verified🏆 2026www.sleepingduck.comMPNs: SDMAT-KNG-F and US-MAT-MACHII-KNG-F443 reviews
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- I never got used to it!
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Purchased this in 2020 after years on a supposedly quality mattress from a big name retail store, which gave back problems. Problems went away after getting this mattress. Still using it 6 years later, no issues. Just remember to rotate it now and again. (Note you can't flip it, it has a fixed top and bottom with different materials). Show details · 1
Reviews with attachments
Best + Even BETTER aftercare 4 years later!! – We purchased a Mattress and later returned it within their 100 days, which we were offered money back or a new firmness. We were wanting a different firmness so went for the firm/firm. No hassles there, next day delivery too. That was great. However due to unfortunate events over 4 years, one leaving a blood stain, and second leaving me unable to… Read more
sleep on the mattress due to an accident we phoned up 4 years later to get the top changed. I will not go into details of what we were offered, but once we accepted this offer which has the be the most unexpected offer ever, they then phoned us back, offered us something ever more mind blowing than I would ever of expected. My point of this review is not to go into details of what I was offered and then reoffered because they are a company and because they have offered us something due to our unique situation they should not have everyone asking for the same thing, but I am leaving this review because my other reviews have helped so many people over the years that I wanted anyone considering this mattress to know that not only is the 100 day sleep trial a real thing, without any hassles or guilty feeling but 4 years later they literally just gave me the best customer service I can ever recall receiving in my 40+ years on this earth. They did not just provide excellent service but after i had a million reasons to not follow up on that offer they gave me, they day I finally took them up on they offer they took all my excuses and reasons i hadn't pulled the trigger into consideration and made a very unique decision to our circumstances which is something I would never of expected, ever. 4 Years later and this level of service is just not something that happens. Their product really is a very special product, you are getting something better than 99% of mattresses I have ever seen in stores for a 1/4 of the price, but the service you get buying from them, the 100 day service you get is exceptional. Now 4 years later their aftercare service has proven to be selfless, kind, very caring and better than any level I have heard of. Carla is the rep we were dealing with and here I am feeling like she is just being polite over emails but probably just annoyed at me among her work mates and then I get a phone call that shows me how far she and her team go for their customers. You are insane if you are looking for a mattress and do not buy from Sleeping Duck. Even after 4 years the mattress has the same shape and the same support it had from day 1. The moment you have it on your bed frame and visually unzip to see all the layers they advertise, you know this is the best quality mattress you could of purchased. You will never look at those $4000 - $12,000 ones in stores the same again. It seems not only does SD offer half and half firmness but now they offer different sections for different painful joints as well. All for the same price and you can try it, change it as you need to. Right now is a very stressful time in our lives, and everyone is walking into a horrible time that is about to change the world. People compare what is happening now to a level only experienced in World War 2 and Sleeping Duck has put that to one side and opened their arms up to us and it is something we will remember for the rest of our lives. Honestly, I actually think their aftercare is so good that as I write this I am wondering if i misunderstood them. It does not matter how many stars these guys can be given, their product and their customer care is both a full 100%. Not even a tiny fraction can be reduced for them. If anyone has had a bad experience with them I would suggest you consider how you approach people in your lives because these people are only here to help you. Customer service are there to help you after you have made your purchase, not there to sell you something. So approach them with manners as everyone deserves and see how people respond.
We love the Duck – So here’s the story. We Purchased a king size mattress with the sleeping duck base. Support from the sales dept was fantastic. No pressure and reassuring ‘get out jail’ conversations in case my decision re ‘firm’ was the correct choice but I was reassured I could switch to a medium support insert. I like the firm, if anything it could be firmer.… Read more · 2
Delivery was painless and I had a special request to delay delivery to a country town in northern NSW which was also professionally handled. My only criticism is that on a hot night the mattress retains the heat and makes it uncomfortable for ME to sleep. For my partner, she had no problem. Overall. Great mattress. Great support. I will review again in 1 year to see if the dreaded ‘mattress SAG’ shows itself, my complaint about every other mattress I have ever purchased.
Sleep Duct springs fail causing bed sag – This is my third review on the sleeping duct mattress - firm king single. Bought July 2022. The springs have FAILED so badly now that my back is in agony. Every morning I wake up I can barely walk and needing crutches and after a few hours I am able to walk without crutches. I'll be posting photo's of the bed failure. You will be able to… Read more
clearly see the slope. It doesn't fall under their warranty much to my annoyance. 10 year warranty may as well be 1000 years they'll never replace it.
It started to go at 6 months and now at 2 years well I can't even roll as the slope down goes into crater where I can't even roll now.
Their warranty is must get a rules and line it across and then measure the dip. Problem is it can look flat with a plank of wood across it. Its only when you lay in it and fall into the middle you notice the crater.
The sad thing is other brands are even far worse so am forced to buy another one knowing now that I'll have to constantly buy new mattress every 2 years.
So I have ordered a new mattress at $1098
A new mattress and it will be level across the bed with no sagging where a one that lasts 6 months or so the sag starts.
Why sleeping duct hasn't looked into this problem 18 months ago when I did my first review almost beggars belief. If there is a manufacturing problem surely you get onto it fast so no one else has these issues.
I guess I see if the new one lasts longer than the one of just over 2 years ago.
===================================== I am stunned is all I can say. I first did a review over 2 years ago and giving them 5 star review. 6 months later beg sag then just over 2 years that was it the bed sag was really bad so bought a new one on August 7, 2024 and after 8 days mattress is sagging again. Its even worse now. If I move down the bed its firm but my feet have to hang over the edge.
There is a crater in the middle of the mattress which is what happened with the other one.
I noticed when the new one came that it wasn't even but higher in the middle section where you could roll off onto the side which was a bit odd. I can see why they did that. They must have an issue they trying to address so build it stronger in the middle.
I am of the view don't buy any mattress with springs. Springs don't pull back up to the same position. I am 15KG lighter than I bought he first one.
I'll attach my tax invoice so they can verify I am a legit customer. I will join Choice web site to see who they recommend.
My physio first put me onto sleep duct. I'll be showing him bed sag as my back is very sore after last nights sleep. Its getting worse every time I go to sleep.
If you look on sleeping duct site they have machines pushing up and down on the mattresses to show how good they are but people don't sleep like that. They lay flat in one position for 8 hours at a time. Its all very well putting a concrete roller over the bed but I doubt you'd want to sleep on it as the bed springs would be stuffed.
Now to go look for a new mattress again.
Latest follow-ups
We are both thoroughly enjoying sleeping on our Duck base & mattress. I'm currently trying a different firmness of foams just to see whether I chose correctly after visiting the showroom in Prahran, Melbourne. The customer service team have been… Read more · 1
excellent and very customer service focused. I highly recommend the Sleeping Duck philosophy and the quality of their product.,
Follow-up · OK, so one month on and here is a follow up review after I slept for 4 weeks on the 'Medium' foam. The foams are pretty easy to change - you unzip the mattress cover & then temporarily remove the memory foam topping to access the changeable individual foams which can be personalised for each sleeper. I took this opportunity to launder the mattress… Read more
I am very happy with my new mattress. It is so comfortable, I’m sleeping better and no longer have back ache when I wake up. The whole process from ordering online through to delivery was excellent! Show details · 1
Follow-up · Still loving my new mattress. You feel as though you are sleeping on your own with no partner movement. I am a side sleeper, the mattress suits me perfectly. Set up was very easy. The king mattress is heavy but with two of us it was no trouble at all.
In-depth reviews
DO NOT BUY - Design & quality issues and not honouring their warranty – We have been loyal Sleeping Duck customers for years. Our first review was 5 star as the service and comfort were exceptional. Friends of ours have purchased 4 x SD mattresses on our say so. We have had the mattress about 4½ years when I noticed that I was getting back and hip… Read more
pain. Started off as a niggle (thought it was old age aches!) but then it kept getting worse to the point that some nights I was taking pain killers to get some sleep. Then I lay in the middle of the mattress and could physically feel the mattress as it used to be. The conclusion is that the mattress has started to collapse. We then went out and bought a new mattress to get some sleep which is really good. Thankfully I have no pain at all. Initially Sleeping Duck were good to deal with at the start but after a few emails they wanted us to unzip the mattress and measure the thickness of various layers of foam which I believe is a nonsense as foam can lose its density but still maintain its overall shape and size. Sleeping Duck say it must have a dip or reduction of 30mm in thickness. Problem is it can look flat with no one lying on it, its only when you lay on it and fall into the middle you notice the crater. With a mattress weight of 65kg, its too much for us to do as they ask and now they are refusing to acknowledge the 10 year warranty without the 30mm test. We will now be pursuing them via NSW Fair Trade. I will never buy or recommend a Sleeping Duck product again, I really do not think that they are an ethical company.
Thanks for reaching out 57Bundy, and we're sorry to… Read more
Which Mattress is best for you ? Sleeping Duck for us., – We laid down on over 30 mattresses over a 3 week period. Some 2 & 3 times to make sure. From Mattress makers, Makin mattresses to snooze . We found the hybrid mattresses the comfiest for my wife and myself. I’ve had multiple spinal operations and my wife suffers from Rheumatoid arthritis. Snooze bedgear mattresses would have been the second … Read more · 3
choice . We tried the Sleeping Duck, fell in love with it instantly. We tried the SD mattresses 3 times at the showroom in South Yarra . So why SD . We didn’t feel any sag around our hip area, no pressure or tension on our joints, muscles or skin., Our daughter & my wife’s brother, both have SD and love them . You can customise the feel to suit you and your partner. After purchase, you can change the feel if you want. There’s no additional cost, all part of the original price. You can try before you buy, 100 day money back guarantee, not just an exchange, no sales pitch, it’s reasonably priced. It ticks a lot of boxes . We purchased an indestructible bed as well., pricey but solidly built . My wife and I are 190kg, I’m 189cm . SD’s after sales service is impeccable. Hope this review helps someone, battling to work out what mattress buy. You must lay down on them for a while, to really get the feel. Compare apples with apples.
Surprisingly wonderful – After my husband finished laughing at me for buying a mattress in a box, we set to reading the directions to set up the mattress. We used the base from the previous mattress and it fits perfectly. To our amazement, it was relatively easy! Within seconds of removing the plastic the mattress expanded to size (a tip - white side up). I made the bed… Read more · 1
up and looked longingly at it during the day. I decided on a early night to try out the new Sleeping Duck mattress and it did not disappoint. We both woke up after having a great night sleep. The mattress is firm with out being hard. It’s really so comfortable I don’t want to get up most mornings. I look forward to going to bed, I know it’s going feel comfy after a big day at work. My husband gets lower back pain and that seems stable at the moment. I read all the reviews before purchasing Sleeping Duck mattress (good and bad), but, I am really happy with my choice of mattress. From the time I placed the order to the quick delivery time, I can’t fault the service or the mattress.
Recent reviews
I have tried many different brand mattresses over the years and never been happy with any of them. I'd always seen the sleeping duck ads. I don't know why I didn't buy one sooner! Definitely glad we finally did! It's fantastic! Show details · 1
I have had sleeping issues for over ten years since I moved to Brisbane and it’s the first time I bought a very high quality mattress. I have to say even though I bought firm mattress, this mattress is so comfortable that your feel as if your gliding. I absolutely love it Show details · 1
Outstanding customer service from the team at Sleeping Duck, Mel in particular went above and beyond to help me work through a detailed enquiry about my setup. She escalated the matter internally multiple times, communicated clearly throughout, and ultimately took the time to get me a thorough and fair resolution. It's rare to deal with a company… Read more · 1
that actually engages properly with a complex question rather than giving a generic response. Very impressed, and very happy with the mattress too.
Find out how Sleeping Duck Mattress Firm King compares to other Mattresses
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The mattress itself is fine, but the way Sleeping Duck promotes replaceable foam components is misleading. The idea sounds great in theory, replace individual layers instead of buying a whole new mattress, but the replacement prices are so high that it’s almost the same cost as buying an alternative product. In reality, this makes the modular… Read more
design feel more like a marketing gimmick than a practical feature. Instead of supporting the longevity of their products, the pricing structure effectively encourages customers to discard the mattress and buy another one.
Thanks for reaching out Andrew, and we appreciate… Read more
Our first Sleeping Duck mattress and we are having the best nights sleep we’ve ever had! We’ve teamed it up with an indestruct bed and can’t recommend enough. Show details · 1
Our first SD experience was so good we decided to upsize to a king sized bed with a SD base & mattress. Result - even better sleep experience. Apart from excellent support we have no partner disturbance BTW our SD queen bed is still like new after 5 years too. Our guests now get to enjoy that mattress. Show details · 1
Very unhappy with the delivery service. The delivery guy left the mattress box in the rain. Even after request from my wife, he wouldn't even put it inside the house. What is the point of leaving it outside the house, especially in the rain. Used the standard excuse..... i have moved into a new house and have bought lots and lots of furniture and… Read more
electronics.... all deliveries were done inside the house.
My wife is someone who is undergoing treatment for degeneration issues with the back and even after explaining all that he left it outside... this is the first time a delivery guy has done that.... shame on you sleeping duck for skimping out on this.
Should use bit more professionalism in deliveries. This is already leaving a bitter taste without even opening the box.
Thanks for taking the time to share your… Read more (+2 replies)
We loved our SD mattress for the first 3 years then we noticed sagging and both my husband and I had sore backs. Ive got to say it gets quite hot in summer too. I wouldn’t buy again and the warranty is not worth it. When I told customer service they wanted a whole lot of pics to show sagging while no one was on it. They also said I could buy new… Read more
foam inserts. Not good enough in my mind. A mattress should last longer and be supportive for more than 3 years. Disappointed
Sorry to hear you’re struggling to find comfort,… Read more (+2 replies)
I had the best sleep of my life last night on the sleeping duck mattress. I am a stomach sleeper, my previous mattress was far too soft, it would cause my body dip while I slept and I’d always wake up with a very sore lower back. I woke up very refreshed and had zero back pain with the mach 2 sleeping duck firm mattress! Show details · 1
Really Comfortable – Best mattress we’ve ever had. Purchased king size, firm on both sides. So comfortable. We both look forward to hoping into bed each night. Delivery service was really efficient and on time. Show details · 1
No Regrets! – I'm a try before you buy kind of person, so I was a little nervous about buying online. No regrets, the quality of the product is fantastic and that is only topped by Sleeping Duck's customer service. I can't rate their support highly enough from initial delivery to adjustment, SD are superb. No regrets! Show details · 1
Perfect comfort! – both my partner and I visited the Melbourne showrooms in Prahan and picked the firm king sized mattress. But we needed to wait until our other mattress was returned but it only took until the next day for the matress to be delieveried so we were very happy. I bought a queen firm mattress a little over 2 years ago and it's still just as good as I bought it. I do have a mattress protector on both to avoid stains/ sweat marks. Show details · 1
Find out how Sleeping Duck Mattress Firm King compares to other Mattresses
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Mattress so comfortable I could build a nest on it and never leave – Both my husband and I were nervous to spend such a large sum of money to end up with a fail. We were also worried the firm would be to firm, however with the return policy thought it was worth a try. From the first night in we loved it. Sleep improvement has improved. Morning pain has decreased. We are only a month in but if it's still like this in a year + we will be extremely happy. Show details · 1
Absolutely the best! – Sleeping Duck is a fabulous company, I have never seen this level of customer service before (every step of the way). I have recommended you several times already & will continue to so. Oh… and did I mention the mattress, I have been searching for it for years, utterly totally the best you’ll find!!! Show details · 1
Heaven – We absolutely love our mattress. One year in and it’s as good as new. We tried the medium but it was was way too soft. An easy switch to the firm and it has settled over time and is absolutely perfect. Every time we go away we can’t wait to get home to our amazing bed. Would give more than 5 stars if I could Show details · 1
Great mattress – Old latex mattress sagged in the middle giving me a sore lower back. New sleeping duck gives me all the support I need and is super comfortable. Delivery was fast too. Show details · 1
Great mattress – Supportive, Comfortable & affordable... great value for money this is our 2nd Sleeping duck we are upgrading from a Queen to a King & we love it & the queen is still being used in our guest room.... love it Terry, NSW Show reply
Terrible sagging after 12months – Purchased in 2020 and Loved the mattress to begin with, felt amazing. But after 12months significant sagging occurred and the mattress was so uncomfortable and started waking with a sore back. Contacted Sleeping Duck and they reluctantly sent out new inserts. This improved the mattress for about 3months before it went back being so uncomfortable… Read more
again. I have to rotate the bed every two weeks now to make it bearable which is so frustrating. It’s beyond uncomfortable and so disappointing given the money spent.
This has happen with a second mattress that was purchased for my elderly mother. Sleeping ducks advise was to place the mattress on the floor for 1-2weeks to resolve the issue which was impossible for an elderly person, after which they charged for new inserts.again only a temporary fix.
On both occasions sleeping duck blamed mattress base for causing the sagging issue and claimed we didn’t meet their ridiculous warranty requirements. Don’t believe all the 5star reviews because it’s only good in the short term. Stay away if you want something that lasts more then 12months!!!
Hi Emma, Thanks for taking the time to provide us… Read more
Inconsistent, 10 year guarantee not true – We bought one, after a couple of years it got all lumpy and they replaced it, as they said it shouldn't have done that. In that time the design changed completely, which is why they had to replace the whole thing, not just a part New mattress was WAY firmer but they wouldn't swap the top because they said it was outside the sleep guarantee, even… Read more
though it was an entirely different design, so we spent more money on the new top. So much for a ten year guarantee.
We find ourselves having to replace the top again, and they have changed the entire design again and also the sizing What used to be king is aparently now super king, so new top was way to small. Also the old topper had a foam backing, new one is just material because the foam has changed in the main design, guess what they won't accommodate for.
So even though we're still in the 10 year guarantee we actually have to buy a new mattress.
Pretty crappy
Hi Lee, We appreciate you taking the time to share… Read more (+3 replies)
Best mattress I've ever ever had. Never going back – Absolutely love this mattress. Purchased the waterproof cover with the amazing all-around heavy duty zipper, and a set of fitted sheets to suit the mattress size. After a recent surgery I've been up on blocks and very bedridden. I purchased the Sleeping Duck in preparation for my recovery, and I've got to say just how happy I am to have this… Read more · 1
amazing mattress at home. Extremely comfortable and supportive. Sleeping Duck staff also are so friendly and helpful with plenty of checking-in to ensure everything is OK. Can't fault anything about Sleeping Duck. So pleased.
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We're sorry to hear you haven't found comfort on… Read more