King Koil Smartlife Lily Luxury Firm

This mattress incorporates Smartlife, a patented body sensing technology that adjusts to your body while you sleep, giving you support and comfort where you need it. With the Smartlife app, it's simple to control and track your sleep and even gain a deeper understanding of your sleep habits.

If you're looking for a superior memory foam experience that is fully adjustable to meet your specific needs, this mattress provides that for you and your sleep partner. If you're looking to track or improve your sleep, the Smartlife app makes it easy.

PureCare Silver five Sided Mattress Protector

from $94.99

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Healthy Sleep Ultra-Tech Advanced Pillow

from $99.99

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Add it

subtotal:

$4,799.99

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Local
Delivery

Delivery and set up is included for free for all orders greater than $399 and if within 25 miles of any Sit ‘n Sleep store.

We will also "haul away" your old mattress and box spring upon delivery of your new order: Just let us know!

Next day delivery on available inventory. Not applicable for UPS and FedEx orders. See our COVID-19 page for more information.

120-Night Sleep Trial

Buying a new mattress is not something you do everyday. Our 120-night sleep trial and comfort guarantee means you can rest easy.

10 Year Warranty

You spend a third of your life asleep on your mattress. Shouldn't you at least lay on it first? Come visit one of our 39 store locations and get comfy with your purchase.

Mattress Removal

We will "haul away" your old mattress and box spring upon delivery of your new order: Just let us know if you would like this service.

Add a Base and Frame:

Knickerbocker Promo Frame

from $67.00

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On Sale

Infinity Platform

from $349.99

$299.99

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New Arrival

Sealy Ease 4.0 Adjustable Base

from $914.00

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Have Questions?

We're here to help. Give us a call or visit your local store.

Firm

Key Feature

Smart Alarm to awaken with a gentle wave motion

Ready for Your Best Night’s Sleep?

This manufacturer or product line does not offer promotional discounts so promotional or discount/coupon codes will not apply to this product.

Smartlife’s Smart Cell Technology incorporates 80 individual Smart cells and 8 independently controlled zones from head to toe to measure your sleep quality. Results are available on the Smartlife app where you can find your sleep time, sleep state, and overall score. ioBED Body Sensing Technology automatically adjusts to your body for proper support and pressure relief.

This mattress is construction from high-quality materials for responsive conformance. HypurAir Gel is a resilient gel infused memory foam that responds and adapts to your body’s movements to maintain optimal sleeping surface temperature. Strategically placed perforations allow for increased airflow to dispense heat away. 4#RMF™ (responsive memory foam) is a high density memory foam that responds and conforms to your body contours to evenly distribute weight alleviating pressure points.

This mattress is adjustable friendly - works well on motion bases. Proudly designed & built in the USA since 1898.
Let this smart mattress adjust automatically to your body. Alternatively, you have the option to manually adjust your mattress's firmness with the SmartLife app, where you can also set your Smart Alarm to ease you out of bed with a gentle wave motion. Dual independent firmness controls allow for individualized comfort and support for you and your sleep partner.
Approx. Queen 60" x 80" x 12" King 76" x 80" x 12" CA King 72" x 84" x 12" Split Top CA King 72" x 84" x 12" Split Top King 76" x 80" x 12"

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