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King Koil Xtended Life Onyx Hybrid

Purposeful materials, craftsmanship and quality for more of what you want and need to sleep well. Having a good night’s sleep every night starts with the right details. The King Koil Xtended Life Onyx Hybrid Mattress gives you more of what makes sleep good. Our most trusted mattress consistently delivers long-lasting daydream worthy sleep by making every thread, coil and inch of foam count.

Medium Mattress-Layered with Lavender Memory Foam, Sustain™ Memory Foam and a Contour Pro Encased Coil System to give you the perfect support you need.
King Koil Xtended Life mattresses are for people who are ready to invest into a better quality of sleep.

PureCare Silver five Sided Mattress Protector

from $110.00

get it Delivery date contingent on available inventory

Healthy Sleep Ultra-Tech Advanced Pillow

from $99.00

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Add it

Multiple Colors

DreamFit Pima Cotton Sheets

from $129.99

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Add it

subtotal:

$2,199.99 $2,399.99

get it Delivery date contingent on available inventory

Local
Delivery

Local delivery and set up is included for a flat fee of $69.99 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

get it Delivery date contingent on available inventory

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Infinity Platform

from $349.99

$299.99

get it Delivery date contingent on available inventory

Sealy Ease 4.0 Adjustable Base

from $899.00

get it Delivery date contingent on available inventory

Have Questions?

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

Medium

Medium Mattress-Layered with Lavender Memory Foam, Sustain™ Memory Foam and a Contour Pro Encased Coil System to give you the perfect support you need.

Key Feature

Hybrid design available in a King Split Top design for personalized comfort.

Ready for Your Best Night’s Sleep?

Proudly Designed, Handcrafted and built in the USA since 1898

Mattress is adjustable friendly - works well on motion bases.

Mattress Height (Approx.) 12.25”

25Year Warranty

SUPER STRETCH TENCEL FABRIC: Moisture wicking natural & breathable sustainable

SUSTAIN™ MEMORY FOAM: Regulates heat pressure relieving comfort made with plant based polyol

LAVENDER MEMORY FOAM: Regulates heat pressure relieving comfort antimicrobial

CONTOUR PRO ENCASED COIL SYSTEM: Reduces motion disturbance conforms to body’s curves relieves body pressure points

GRAPHITE TALALAY FIRM LATEX: Pressure relieving support highly resilient & durable wicks away moisture & heat

PERSONALIZED HEAD COMFORT: Available in a King or CA King Split Top design

ADDITIONAL FEATURES: Anti-Microbial Safeguard Fibers, HD Foam Encasement, Everlast® Base Foam

Approx. 

Twin 38" x 75" x 12.25" 

Twin XL 38" x 80" x 12.25" 

Full 54" x 75" x 12.25" 

Queen 60" x 80" x 12.25" 

King 76" x 80" x 12.25" 

CA King 72" x 84" x 12.25"

King Split Top 76" x 80" x 12.25" 

CA King Split Top 72" x 84" x 12.25"

What Customers Are Saying