Best Firm King Size Mattress 2020: Top 5 Choices Revealed What’s better than a king-size mattress? Some would say that would be a firm king size mattress. Indeed, some people appreciate the comfort of a soft mattress – but some individuals sleep better on a firm mattress. These mattresses provide more support, particularly for those that tend to sleep on their back. But among so many good options, how do you know which one is the best one for you? Well, first things first, you inform yourself on the matter – and once you have all the necessary information, you read as many reviews as possible to make the right decision. 4.3 / 5 ( 31 votes ) BEST 2020 PROS CONS OUR VERDICT Type Firmness Features Packing Certification Weight Warranty Deluxe Beds 2000 Pocket Sprung Firm King Size Mattress See Deal PROS - Features a great quality and build - Is highly supportive and firm - Is very affordable for the price that it is sold at - Effective against allergies and very comfortable CONS - Has no handles to make turning over easier OUR VERDICT Overall, the mattress features quite a good build and quality, considering the price it is sold at. Type Pocket Spring Firmness Firm Features combining an exclusive classical damask fabric with 2000 pressure relieving pocket springs and sumptuous fillings Packing Full size mattress, delivered flat Certification Conforms to UK Fire Safety Regulations Weight Heavy Warranty 1 year Silentnight 1400 Pocket Natural Firm King Size Mattress See Deal PROS - Very breathable due to the wool and cotton filling - Mirapocket spring system is silent and supportive - Very comfortable, despite the fact that it is quite firm CONS - Warranty is short - Some complain that it is actually medium-soft OUR VERDICT The mattress is a very supportive and breathable choice for those that like sleeping on their back. Type Mirapocket zoned spring system Firmness Firm Features Hypoallergenic, Natural Wool Comfort Layer, Tufted Sleep Surface Packing Full size mattress, delivered flat Certification Conforms to UK Fire Safety Regulations Weight 54.5 Kg Warranty 5 years Happy Beds Orthopaedic Firm King Size Mattress See Deal PROS - The mattress is incredibly firm and offers great support - Quite a soft and adherent cover that will not let the sheets slip or move around - Sold at quite an affordable price CONS - Some users complain that it is actually too firm - May only be suitable for those on the heavier side OUR VERDICT If you are looking for a very firm mattress that offers a lot of support, then this one might be a very good choice for you. Type Open Coil Spring Firmness Firm Features Adorned with rich damask fabric and a durability enriching hand-tufted patterns Packing Full size mattress, delivered flat Certification Conforms to UK Fire Safety Regulations Weight 31 Kg Warranty 1 year Silentnight Miracoil Ortho Firm King Size Mattress See Deal PROS - Some people say that it collapses at the edges after some time CONS - Some people say that it collapses at the edges after some time OUR VERDICT Many people were impressed by this mattress, because it remains supportive and comfortable, all while being firm. Type Miracoil Zoned Spring System Firmness Firm Features The mattress provides three support zones for pressure relief on your hips and shoulders ensuring perfect spinal alignment Packing Rolled, mattress in a box Certification Conforms to UK Fire Safety Regulations Weight 25 Kg Warranty 5 years Naturalex Living Bio Memory Foam Firm King Size Mattress See Deal PROS - Takes quite a long time to fully expand - Some people find it too hard CONS - Takes quite a long time to fully expand - Some people find it too hard OUR VERDICT The product is great if you are looking for a firm mattress, one that also provides perfect seasonal comfort. Type Memory Foam Firmness Firm Features Blue Latex and Aero Latex technology for firm support, Bio Memory technology Packing Rolled, mattress in a box Certification Conforms to UK Fire Safety Regulations, Oeko-tex® Certified Weight 21.2 Kg Warranty 5 years Deluxe Beds 2000 Pocket Sprung Firm King Size Mattress See Deal Silentnight 1400 Pocket Natural Firm King Size Mattress See Deal Happy Beds Orthopaedic Firm King Size Mattress See Deal Silentnight Miracoil Ortho Firm King Size Mattress See Deal Naturalex Living Bio Memory Foam Firm King Size Mattress See Deal Deluxe Beds 2000 Pocket Sprung Firm King Size Mattress READ REVIEWS & CHECK PRICE Deluxe Beds 2000 Pocket Sprung Firm King Size Mattress Those of you searching for a comfortable and supportive firm king size mattress that won’t make you feel as if you are sinking into it might want to look into this Deluxe Beds 2000 Pocket Sprung Firm King Size Mattress. Featuring pocket spring technology, this firm king size pocket sprung mattress has 2000 springs that are individually wrapped and sealed tight to ensure that no movement escapes. Thanks to this, motion transfer stop. This firm king size mattress is a two-sided design, which means that it can be turned. To prolong the lifetime of your mattress, it should be rotated every few months. Each side is firm, and by turning the mattress every so often, you will prevent it from sagging. The Deluxe Beds 2000 Pocket Spring Firm King Size Mattress is hypoallergenic – this means, if you are suffering from asthma or allergies, this firm king size firm mattress won’t trigger these conditions. The damask fabric is breathable – making it also an excellent choice for environments where the weather tends to get quite hot. Many features make this firm king size pocket sprung mattress a worthy investment, and you will find out more by reading further reviews here on Amazon. Silentnight 1400 Pocket Natural Firm King Size Mattress READ REVIEWS & CHECK PRICE Silentnight 1400 Pocket Natural Firm King Size Mattress How many times did you woke up in the middle of the night due to your partner`s tossing and turning? It sure felt that way, given that you never actually fell asleep. This is precisely why this firm king size mattress is a convenient choice – because it is what you need in terms of size and comfort. Featuring a quality, Mirapocket zoned spring system; the Silentnight 1400 Pocket Natural Wool Firm King Size Mattress is supportive – all while reducing motion transfer. This is because all of the 1400 springs have been individually wrapped – meaning that if your partner moves, the motion movement will not be transferred to your side of the mattress. This firm king size mattress features natural wool and cotton fillings for extra comfort. Since these materials are naturally effective at regulating temperature, it should keep you fresh during summer and warm during the winter months. It is a breathable mattress that will not only prevent your body from overheating during sleep but will also keep allergies at bay. You may find out more about this mattress by reading what the customers have to say on Amazon. Happy Beds Orthopaedic Firm King Size Mattress READ REVIEWS & CHECK PRICE Happy Beds Orthopaedic Firm King Size Mattress Happy Beds have never failed to make their sleepers happy, as even their firmest of mattresses tend to be comfortable. Made from high-quality materials but sold at a price that won’t send your budget straight down the drain, this is a good option for those that do not want to spend too much on a firm king-sized mattress. Filled with layers of materials, including polyester and satin pads, this firm king size mattress is not only very comfortable but also quite breathable. Moreover, the mattress features durability that should last you for years, as it has a smartly crafted network of open-coil springs. This firm king size mattress is of a solid built– the perfect choice if you and your partner tend to sleep on your back. The firmness is further on improved by the sturdy reflex foam, which is generally used for those that require orthopaedic support. Find more about the Happy Beds Orthopaedic Open Coil Spring Firm King Size Mattress by reading the reviews customers have left on Amazon. Silentnight Miracoil Ortho Firm King Size Mattress READ REVIEWS & CHECK PRICE Silentnight Miracoil Ortho Firm King Size Mattress If you are a picky sleeper that wakes up often during the night, then you might have a particular sensitivity to movement – if so, you need to find a mattress that won’t transfer motion when your partner changes positions whilst sleeping. With its Miracoil spring system, this firm king size mattress will not transfer motion, even if your partner is continuously tossing and turning. This firm king size mattress features a 3-zone support design for every part of your body. This means that the pressure on your shoulders and hips is relieved efficiently so that you can get the perfect spinal alignment. Last but not least, the Silentnight Miracoil Ortho Firm King Size Mattress is breathable and comfortable EcoComfort Fibre that will keep you cool and comfy throughout the night. It features a hypoallergenic design that keeps dust-mites at bay – making it the perfect choice if you have asthma or allergies. You may find out more about the product by reading the customer reviews on Amazon. Naturalex Living Bio Memory Foam Firm King Size Mattress READ REVIEWS & CHECK PRICE Naturalex Living Bio Memory Foam Firm King Size Mattress If you don’t tend to sleep very well on synthetic fibres, then this firm king size mattress that uses bio memory foam should prove to be the best choice for you. Featuring Aero Latex and Blue Latex technology, the Naturalex Living Bio Memory Foam Firm King Size Mattress wraps you in comfort and provides a great night’s sleep. Plus, thanks to the density of the memory foam, you will get the support that you need. This firm king size mattress memory foam features two sides to sleep on, one for summer and one for winter – allowing you to sleep very well, regardless of the season. The summer side has a gel microcapsule technology that reacts to the high temperature – therefore, working to keep it down and comfortable. You should feel fresh while you are sleeping, as the filling is quite breathable. The winter side is also something that people look forward to. Not only do you get perfect comfort and support, but this side has also been covered with specific SoftSensation fabric. This fabric is not only very soft to the touch and adherent for sheets, but it is also well-ventilated and hypoallergenic. You may find out more about its properties by reading the customer reviews left on Amazon. Things to Look for in a Firm King Size Mattress Who Needs a Firm Mattress? Before buying a firm king-sized mattress, you will first need to determine precisely what kind of sleeper you are. In most cases, if you tend to sleep mostly on your back or your stomach, then a firm mattress is the right choice for you. This will work to keep your spine correctly aligned so that you will not wake up with back pain in the morning. It should also prevent any unnecessary sagging. At the same time, those that are on the heavier side might also benefit more from a firm mattress. This will provide you with the support that you need – and the chance of the mattress sagging should also be much lower. Who Wouldn’t Benefit from a Firm Mattress? The people that don’t like the feel of a firm mattress should steer clear from purchasing this mattress model. Moreover, if you are a side sleeper, firm mattresses will not be the right choice for you, mostly because the high density of the mattress will prevent your shoulders and hips from properly sinking in the bed. This will keep your spine in an awkward position, causing you to experience back pain in the morning. At the same time, if you are particularly thin and do not weigh much, you should also avoid buying a firm mattress. This is because you will not be able to generate enough pressure to sink into the bed – and will pretty much feel as if you are sleeping on a rock. This can cause quite a lot of discomfort. Firmness Level It might be called a “firm” mattress, but there are different levels of firmness: medium-firm level, firm, extra firm. You need to determine which one works best for you. Material There are a variety of materials that you can go for – but when it comes to firm mattresses, people prefer innerspring, latex, and memory foam. However, depending on the model, you will also find quality pocket sprung firm mattresses. Edge Support When searching for a good quality mattress, you should also look into excellent edge support. This will prevent the sagging of the mattress and will increase its durability. Bear in mind that if you are slightly on the heavier side, you will have to invest even more on edge support. Air Flow The last thing you want is to feel that your mattress is suffocating you, causing you to wake up sweaty during the night. This is why you want to look for a mattress made from breathable materials – the kind that can control your body temperature and keep you fresh throughout the night. Final Thoughts Purchasing a firm king size mattress should not be difficult to do, mainly if you know precisely what to look for. The right choice can give you all the support that you need – ensuring that you wake up without back pain in the morning.