by The King Koil’s Smart life mattress is the latest addition to the King Koil series. The 12-inch mattress comes with patented body sensing technology and four independent zones.
The ergonomic alignment helps adapt to your body weight and lets you sleep comfortably through pressure relief. With the newest relaxation mode and sleep tracking app that calculates your sleep score, you can sleep smartly.
Still, if you are looking for a much smarter mattress technology-wise, opt for Ghost Smartbed 3D Matrix mattress. It has the option of infinite customization and smart sensors to detect your body type. The patented cooling technology and easy usage app allow you to control your mattress from your phone.
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Last Updated: March 2026 — Content reviewed and verified by our editorial team.
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The King Koil’s Smart life mattress is the latest addition to the King Koil series. The 12-inch mattress comes with patented body sensing technology and four independent zones.
The ergonomic alignment helps adapt to your body weight and lets you sleep comfortably through pressure relief. With the newest relaxation mode and sleep tracking app that calculates your sleep score, you can sleep smartly.
Still, if you are looking for a much smarter mattress technology-wise, opt for Ghost Smartbed 3D Matrix mattress. It has the option of infinite customization and smart sensors to detect your body type. The patented cooling technology and easy usage app allow you to control your mattress from your phone.
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The King Koil’s Smart life mattress is the latest addition to the King Koil series. The 12-inch mattress comes with patented body sensing technology and four independent zones.
The ergonomic alignment helps adapt to your body weight and lets you sleep comfortably through pressure relief. With the newest relaxation mode and sleep tracking app that calculates your sleep score, you can sleep smartly.
Still, if you are looking for a much smarter mattress technology-wise, opt for Ghost Smartbed 3D Matrix mattress. It has the option of infinite customization and smart sensors to detect your body type. The patented cooling technology and easy usage app allow you to control your mattress from your phone.
The #1 alternative we recommend
Pros and Cons
What We Like
- Luxury innerspring with excellent lumbar support
- Multiple firmness options available
- Free white-glove delivery and mattress removal
- 365-night trial and lifetime warranty
What Could Be Better
- Higher price than many online brands
- Heavier than foam mattresses
- Not compressed in a box
- Some off-gassing possible initially
Who Do We Recommend King Koil Smartlife Mattress for?
- If you are a couple and both prefer different sleeping conditions, opt for the King Koil Smartlife mattress.
- If you love to bounce in your mattress, then the Smartlife mattress is designed to contour your body in any sleep position or style.
- If you want a mattress with nine comfort settings ranging from plush to firm.
Avoid King Koil Smartlife Mattress If:
- You are a hot sleeper who prefers sleeping on a cooler bed. The Smart life mattress does not have cooling gel technology like the Ghostbed 3D mattress.
- You want a mattress that lasts up to years. The Smartlife mattress tends to sag only after seven to eight years.
Comfort & Firmness
The Smartlife comes with nine firmness ranging from soft to firm mattress levels. The smart layers of memory foam layer help contour the body according to the body type. You can easily select the preferred comfort from multiple personal comfort settings that match your body weight and sleeping position.
The Ghost SmartBed, however, has firm to plush firmness or anything in between, which suits every body type. The five individual body zones on each side help you sleep comfortably. Therefore, a better or ideal option is the Ghost SmartBed, with optimum comfort and proper support.
Performances
The King Koil Smart life mattress is the newest addition and features smart technology. Smart life technology enables sleepers to monitor themselves by turning on the relaxation mode. The gentle pulses throughout the bed let you go into a deeper sleep in no time. The high-quality raw material allows better sleep and ensure proper support.
However, the Ghost Smart bed mattress is more advanced than the King Koil mattress. You can sleep according to your preference using manual, Automatic, and position settings. Many awards and high reviews from customers acknowledge its high performance.
Is it a Good Mattress for Back Pain?
The material used in this Smartlife King Koil mattress is of top quality. The built-in air pockets (like in air mattresses) help adapt to the body type. The pressure sensors quickly pick up any changes in the body during deep sleep and adjust accordingly fora great night's sleep.
However, the Ghost Smart bed mattress is induced with the patented gel polymer and memory foam, which helps contour the body and the spine. It is beneficial and effective for people suffering from back pain or stiff joints.
Sagging and Edge Support
The King Koil gives the optimum amount of edge support. The good quality material prevents sagging but only for the initial seven years.
You can choose the Ghost Smart bed if you want a mattress that doesn't sag in the long run. With a polymer and a transition layer, it doesn't sag and lasts up to years. The optimum edge support helps you stay on the mattress easily.
Motion Isolation
The Smart life mattress allows you to select your comfort settings. It is a good choice for couples as they can select their preferred firmness ranging from soft to medium.
The GhostSmart bed is ideal for couples and all types of sleepers. The dual side sensors with the responsive memory foam polymer gel help keep the motion in control. So, the minimal motion transfer helps keep your partner still even if you move or jump around.
Sleeping Position and Weight
The KingKoil Smartlife is ideal for all types of sleepers. The air chambers present in the mattress allow customizable support. You can sleep on the Smart life Ling Koil mattress regardless of weight or position.
Breathability & Heat Transfer
If you are a hot sleeper, you might not want to invest in the King Koil Smartlife mattress. The Graphite-infused memory foam layer does not cool you and keeps you hot throughout the night.
The Smart Ghostbed mattress, on the other hand, has patented smart cooling technology. The gel polymer layer ensures not to trap any heat released from the body and lets you get a cool and perfect night's sleep throughout the night.
Durability
The Smart Life mattress by King Koil is durable for only a short period of seven years. They show signs of wear and may sag after some time of use.
The Smart Ghostbeds mattress, on the other hand, may last up to ten years. If taken proper care of, they can be used for twelve to fifteen years.
What is the King Koil Smartlife Mattress Made of?
The layers of King Koil Smartlfe mattress features the following layers:
Graphite-infused top layer: The top layer consists of graphite that traps heat from the body.
The memory foam layers: The comforting layers underneath are memory foam which helps give the optimum amount of support to your body.
Air chambers layer: The third layer features unique, customizable air chambers. The cells are connected, allowing the air to pass to get the desired firmness.
Base Layer: The base layer again comprises a memory foam layer that gives adequate body support.
Is King Koil Smartlife Flippable?
Yes, you can flip around the Smartlife mattress as they are double-sided. You can flip them every three months and get a bouncier and fresher side to sleep on.
Does King Koil Smartlife Come in a Box?
Yes, the King Koil Smartlife mattress comes properly packed in a box.
Is King Koil Smartlife Usable with an Adjustable Bed?
The King Koil Smartlife mattress works with adjustable bases. The mattress comes with a split head configuration. This allows both partners to control their side of the bed without disturbing the other.
Is King Koil Smartlife Mattress Made in the USA?
The King Koil Smartlife Mattress are Hand Crafted in the USA and is now being sold worldwide.
Price Range
The King Koil Smart life mattress ranges from USD$ 799 to USD6099. They only have King, Queen, and California King available.
| Size | Dimension | Price |
| Queen | 60 inch x 80 inch | 4799$ |
| King | 75 inch x 80 inch | 6099$ |
| California King | 72 inch x 84 inch | 6099$ |
Trial, Shipping, and Warranty
All Smart life mattresses are given a warranty only if present in the USA. If outside USA, you can contact the local dealers from where you bought the mattress.
25-year warranty: For the first four years, the King Koil smart mattress gives a warranty free of cost. The company will replace any defect without any additional cost. You will have to pay 20% of the repair cost from the fifth to the twentieth year. For the last five years, owners have been paid 84% of the total cost of the repairs.
Sleep trial: The King Koil Smart life mattress has a 120 days warranty.
Our Verdict?
The King Koil Smart life mattress comes with the latest technology that adapts to your body and sleeping style. However, it is lagging in cooling technology and other important features.
If you are looking for a mattress with it all, you can opt for the Ghost SmartBed mattress. It is embedded with the latest technologies like motion sensors, adjustable air chambers, and built-in cooling technology. With five individual body zones, its customizable design adjusts to every sleeper.
Our Top Mattress Pick
| Saatva Classic | $1,395+ | Shop |
| Saatva Contour5 | $1,595+ | Shop |
| Saatva Zenhaven | $1,895+ | Shop |
King Koil SmartLife Mattress Reviews
The King Koil SmartLife is a mattress line that integrates sleep-tracking technology directly into the bed. Queen pricing typically ranges from $1,200 to $2,000 depending on the specific model and retailer. King Koil, a brand with roots dating back to 1898, sells through traditional retail channels including furniture stores and mattress shops.
The SmartLife series uses pocketed coil support systems combined with various foam comfort layers including memory foam and gel-infused polyfoam. What sets it apart is embedded sensor technology that monitors sleep patterns, heart rate, and breathing through a connected app. The mattress itself delivers a medium to medium-firm feel, around a 6 to 7 out of 10, that works for back sleepers and combination sleepers.
The sleep-tracking feature is a mixed bag. Some users find the data interesting and useful for adjusting habits, while others report that the app is unreliable, disconnects frequently, or provides data that does not align with dedicated sleep trackers like the Oura Ring or Apple Watch. The mattress itself, setting technology aside, is a competent mid-range hybrid, though not exceptional for the price.
Warranty terms are typically 10 years, and trial periods depend on the retailer, ranging from 30 to 120 days. White-glove delivery may be available for an additional fee through select dealers.
How does it compare to Saatva? The Saatva Classic ($1,779 Queen) focuses on what matters most, exceptional sleep comfort through a proven coil-on-coil design. With a 365-night trial, lifetime warranty, and free white-glove delivery with old mattress removal, Saatva invests in build quality rather than technology that may become obsolete.
King Koil: What Buyers Should Know Before Purchasing
Shopping for a King Koil mattress means weighing several factors that reviews alone cannot capture. Here is a practical framework for evaluating this brand against your specific sleep needs.
Questions to Ask Before Buying
- What is the trial period? Check whether the retailer or brand offers a risk-free trial. Anything under 100 nights limits your ability to properly evaluate comfort through different seasons and sleep cycles.
- What does the warranty actually cover? Read the fine print on sagging thresholds, stain exclusions, and foundation requirements. A warranty that sounds generous on paper may be difficult to claim in practice.
- How is the mattress delivered? Bed-in-a-box delivery means self-setup and potential off-gassing. White-glove delivery includes professional setup and old mattress removal.
- What do long-term owners say? Filter reviews by 1-year and 2-year owners. Initial comfort impressions often differ from long-term satisfaction.
How King Koil Compares on Key Metrics
Every mattress purchase involves trade-offs. King Koil may excel in certain areas while falling short in others. The most important factors for long-term satisfaction are durability (will it maintain support beyond year 3?), temperature regulation (will you sleep hot?), and purchase protections (can you return it hassle-free if it does not work?).
The Saatva Classic at $1,779 for a Queen benchmarks well on all three: coil-on-coil construction for proven durability, open coil airflow for cooling, and a 365-night home trial with free white-glove delivery and lifetime warranty. Use it as a reference point when evaluating any mattress in this category.
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