King Koil Lily Smart Life Mattress

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Here at Best Mattress, we are devoted to giving you a better night’s sleep. We hand select all of the mattresses we have in store and only choose those brands that you can trust. King Koil is one such mattress company that we are proud to represent. This company has years of experience providing high-end luxury mattresses for their customers, with a wide range of specialty mattresses to accommodate a wide variety of sleeping needs.

Why Choose King Coil?

King Coil is one of the major players in the mattress game and has been around for a very long time. The company was originally known as US Bedding, and they started producing mattresses way back in 1898. They certainly know what they are doing, and customers around the world have benefited from the high-quality comfort that their mattresses provide.

If you’re looking for a new mattress for your bed, you are making a wise choice when you pick a King Koil mattress. And with the King Koil SmartLife Lily SmartLife Medium mattress, you can be guaranteed optimum rest and a better night’s sleep.

Why Choose The Lily SmartLife Medium Mattress?

Using patented Smartlife technology, King Koil has developed the Lily SmartLife Medium mattress to adjust to your size and adapt to the way you move in bed. It adapts and contours to the shape of your body and offers support and comfort, right where you need it the most. It’s something you need to try out for yourself, and you can do so by visiting us in-store.

The Lily SmartLife Medium mattress uses Smartlife’s Smart Cell Technology which includes over 80 individual Smart Cells and eight independently controlled zones to give your body the support and comfort it needs. You can use the attached remote control or the SmartLife app to manually adjust your mattress into the position that is best for you. This will give you the best night’s sleep possible, with the proper support and pressure relief that your body needs.

When you wake up, you can use the Smartlife Relaxation Mode to gently ease you out of bed with a soothing wave motion. You will then be able to start the day the right way, feeling fully refreshed and ready for the day ahead.

Using the Smartlife app, you can also track your sleep remotely. You can measure the way you sleep each night and view your daily, monthly, and yearly sleep statistics. You can then program it to give you better comfort control, with a range of features that are designed to optimize your sleeping pattern.

With the revolutionary Smartlife technology, you can experience your Lily SmartLife Medium mattress your way. You need never have a bad night’s sleep again, so if you’re looking to replace your old mattress, this technological marvel from King Koil might be your number one choice!

Product Features

The 4#RMF™ Responsive Memory Foam Is Designed For A Better Night’s Sleep

This superior, high-density memory foam responds and conforms to your body contours. It evenly distributes weight to prevent pressure points and gives you the chance of a better night’s sleep with no tossing and turning.

The Memory Foam Is Infused with HypurAir Gel For Added Comfort

The highly resilient gel-infused memory foam responds and adapts to your body’s movements to give you the optimal sleeping surface temperature. Increased airflow is enabled due to strategically placed perforations, meaning you won’t become too hot or uncomfortable when you’re lying in your bed.

The Patented Body Sensing Technology Will Give You The Perfect Night’s Rest

The ioBED Core Technology featuring Smartlife’s patented Body Sensing Technology will automatically adjust to your body shape, weight, and height. It continuously monitors you as you sleep, and adjusts to your sleep position to ensure proper support and pressure relief is given for a perfect night’s rest.

The Smart Cell Technology Has Many Great Features

A better night’s sleep is guaranteed thanks to the 80 individual Smart cells and 8 independently controlled zones that can relax your body from head to toe. The technology includes a number of features that can be accessed via the remote control and corresponding app. These include:

  • Independent firmness controls to provide individualized comfort and support
  • Sleep tracking, with an overview of your daily, weekly, monthly, and annual sleeping patterns
  • A smart alarm that allows you to wake up peacefully with a gentle soothing motion to your body
  • A massaging relaxation mode that can be used at bedtime or when you’re in need of some stress-relief

The Lily SmartLife Medium Mattress

If you’re looking for a new mattress, we think you will agree with us when we say this is one of the best.

With improved sleep, thanks to the SleepLife technology, added comfort with the high-density memory foam, and the 25-year manufacturer warranty for extra peace of mind, you aren’t going to be disappointed by the King Koil Lily SmartLife Medium mattress.

Product Specifications

Proudly designed and handcrafted in the USA.


  • Mattress Height: 12″
  • Queen: 60″ X 80″
  • King: 75″ X 80″
  • California King: 72″ X 84″

Comfort Design

  • HypurGel
  • 4#RMF (responsive memory foam)

Support Design

  • Body Sensing Technology featuring Smart Cells
  • Foam Encasement

Shop Online or In-Store

At Best Mattress we understand that it can take a while to choose a new mattress, but our expert team is here to help you every step of the way.

We have a wide range of mattresses available, including the King Koil Lily SmartLife Medium mattress. Browse our website, give us a call or visit us in-store. We will get to know your personal needs and will give you the opportunity to try out our mattresses for yourself.

Our 120 Day Sleep Guarantee

If you have owned your mattress for longer than 30 days and you aren’t happy with your set, Best Mattress is glad to exchange your mattress for 120 days from the date of purchase. Please see our full terms & conditions here.

You deserve a better night’s sleep, so contact us, and let us help you achieve the blissful night’s slumber you are longing for.