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Home  >::  Clearance  >::  Mattresses Clearance  >::  King Koil Perfect Response Sonoma Firm Memory Foam Full Matt...
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King Koil Perfect Response Sonoma Firm Memory Foam Full Mattress

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Accidents Happen
With our comprehensive, 5-Year Platinum Protection Plan you won’t have to worry. It will give you peace of mind so you can thoroughly enjoy your purchase. What’s Covered?
Standard 5-Year Platinum Protection includes a basic, breathable mattress protector.
Premium Encasement 5-Year Platinum Protection includes an allergen-resistant 360° full mattress encasement.
Performance Moisture Wicking 5-Year Platinum Protection includes stay-dry, moisture-wicking mattress protector.
Performance Cooling 5-Year Platinum Protection includes a stay-cool, temperature-regulating mattress protector.
SKU: 478024107
OUTLET $359.95 Select mattress and base options to see price.
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5-Year Platinum Protection Available
Raymour & Flanigan offers an optional 5-Year Platinum Protection Plan. So you never have to worry about your furniture or mattress.
Get it tomorrow
With our next-day mattress delivery, you can sleep better as soon as tomorrow!
In-Store Pickup
In-store pickup includes unlimited furniture items and can be available in most showrooms within a few days.
Current Sale Details
Today's Financing Offer
Features & Dimensions
Better sleep starts with the King Koil Perfect Response Sonoma firm memory foam full mattress. Get a breathable, comfortable night's sleep with luxurious stretch knit fabric and 4" total of foam comfort layers.
Full Dimensions & Weights
Full Mattress
L: 75" x W: 54" x H: 9"
Weight: 38 lbs.

with 5" Low-Profile Box Spring (optional)
L: 75" x W: 54" x H: 14"

with 9" High-Profile Box Spring (optional)
L: 75" x W: 54" x H: 18"
Color: White Brand: King Koil Northeast Support System
5" Soy-based support foam provides substantial support and works in conjunction with the other support layers.

Quilt Layers
3/8" Luxurious stretch knit fabric and Antimacrobial Safeguard™FR fiber creates conforming comfort and breathability while being fire retardant

Comfort Layers
1" Memory foam layer, 1" reaction comfort foam provides supportive comfort and 2" comfort support foam

Reaction comfort foam provides pressure relief and conformance to all body types.

Comfort support foam enhances the sleeping surface by offering support and comfort.

Box spring optional
Natural wood foundation
You may add a box spring by selecting your preferred foundation from the options listed above.

Extended financing is not available for Outlet merchandise
Delivery & Shipping Back to Features
Enter your zip code to see your delivery options
Questions about delivery?
FREE Next-Day Mattress Delivery Available
Your white-glove delivery experience includes:
  • Next-day mattress delivery
  • Free old mattress removal
  • Friendly Raymour & Flanigan delivery team
  • Perfect placement - tell us right where to set it
In-store pick-up also available
Mattress Only Delivery Fees for Fairfield, CT 06828
  • $49.99 if your mattress purchase is less than $500
  • FREE if your mattress purchase is more than $500
Manufacturer Warranties
At Raymour & Flanigan, we stand behind our quality products. We are committed to upholding manufacturer warranties during their specified time frame. If furniture covered by a manufacturer's warranty is unable to be repaired during the warranty period, we will replace the damaged piece of furniture with the same model. If the same model is no longer available, you may choose a replacement item.

To ensure we provide you with the best customer service experience possible, please be aware of the following when you choose a replacement item:
1.) A Raymour & Flanigan store manager will do everything he or she can to ensure you're completely satisfied with your replacement item. Please be aware that if your replacement furniture's everyday selling price is greater than the original purchase price of the item being replaced, you will only be responsible for the cost of the difference plus applicable tax. If a less expensive item is selected, you will not be responsible for any additional cost.

2.) If your replacement item doesn't match the other piece(s) of the same collection you purchased at the same time and the other pieces are still covered by the manufacturer's warranty, we'll happily offer you a one-time option to replace the other piece(s) of your collection for a usage fee. The usage fee shall be equal to the greater of twenty percent (20%) of the original invoice price of the other pieces or two percent (2%) of the original invoice price of the other pieces for each month (or partial month) between the date of delivery and the date of your claim.

3.) To expedite your replacement, you must accept delivery of your replacement item within 10 days from the date we agree to replace your furniture.

4.) As an additional convenience, if your furniture needs to be serviced after the manufacturer's warranty expires, we can provide an in-home visit by one of our expert service technicians. Please contact our Customer Care Center to set up an appointment and receive information on applicable charges.
Use a protective mattress pad, included with your purchase of our 5-year protection plan. Vacuuming is the only recommended cleaning method.
Mattress Buying Guide Back to Features
We understand that buying a mattress is a hard decision and we want you to love your new mattress! Here are some tips and tricks we have gathered to help you make your decision. We also encourage you to go into a store to take our comfort test to make sure you are getting exactly what you need.


  • How much room do you really need?
  • Do you have enough room in your bedroom?
  • Will the mattress work with your current bed frame?
  • Try our room planner to see if everything will fit

Adjustable Bases


  • Offer virtually unlimited ergonomic rest positions for a more restful sleep
  • Some models feature memory buttons, massage options and wireless controls
  • Many are designed to fit within your existing bed frame

Adjustable Bases


Rest assured, split box springs offer all the support of a 1-piece. The main benefit of a split box spring is that it is easier to maneuver through tight passages and stairwells.

  • All king mattress sets come standard with a split box spring.
  • Most queen mattress sets are offered with the choice of a 1-piece or a split box spring.

Adjustable Bases


  • Offered in split and 1-piece styles
  • Offers added height if your mattress is not deep

Adjustable Bases


  • Offered in split and 1-piece styles
  • Offers less height if your mattress is very deep. Many of the new mattress styles are higher than older styles. It is important to measure all the pieces so you are comfortable getting in and out of your bed.

Adjustable Bases


  • Offered in split and 1-piece styles
  • Perfect for adding a little extra support for both bunk beds and platform beds.


For a person of average height, the mattress surface should be about 25" from the floor. Add bed frame height to the height of your mattress and subract your total from 25" to determine whether a high-profile or low-profile box spring is best for you.


  • Box spring, adjustable base or bunkie board is required.
  • Bed frame is generally 3"-4" from the floor.


  • Not made to accept a box spring or an adjustable base.
  • For extra support, a bunkie board can be used.
  • Bed frame is generally 9"-10" from the floor.

We want you to love your new mattress. With the purchase of our optional Platinum Protection Plan, you can opt to reselect a new mattress if you're not completely satisfied with your choice. (some conditions apply, please see details) Plus, rest assured—this plan also covers most stains and accidents for 5 years.
What's Covered? View Full Plan Details »

Sub Brand: King Koil
Mattress Type: Memory Foam
Comfort: Firm
Product Reviews Back to Features
4.6 / 5.0
38 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Firm yet comfortable
We bought the full size mattress as a guest bed. It’s extremely comfortable and nice to have a mattress that isn’t too deep as well! Sheets fit nicely. We’ve had two house guests so far and both have complimented the good nights sleep they had on our bed! For the money, it was well worth it!
August 19, 2019
1 month ago
Perfect Firm Mattress
I recently purchased a full size Sonoma Firm Memory Foam bed, and I'm more than happy with it! Just as firm as a coil mattress but without being too "stiff." It feels like there's more support and distribution than a bed with coils. I suggest consumers find two similar beds in store, don't be rushed, and compare memory foam and coil firm mattresses.

This is the first memory foam bed I've had and there's no going back! Not waking up with painful shoulders and neck anymore. Thank you!
July 12, 2019
2 months ago
Great, very comfortable.
July 6, 2019
3 months ago
I like the low feature to the ground for my daughter very stiff but soft
May 24, 2019
5 months ago
TJ's New Foam Mattress!
This is for my son. He loves it! Said being on the edge throws him off a bit. First foam mattress.We've only had innerspring before this.He's happy with it!Thanks Raymour & Flanigan!
May 14, 2019
4 months ago
Things are great at Sonoma.
I will recommend; However a pillow top would make a blissfully difference.
May 6, 2019
4 months ago
Comfortable. Cool temperature. Modern height.
May 3, 2019
5 months ago
Awesome great night sleep
Very firm just what was needed, slept like a baby.
April 15, 2019
5 months ago
Excellent Mattress
Very good, firm mattresses at a fair price point. In my first week of sleeping on it I'm already getting better nights of sleep than in the past few years. I would highly recommend to anybody dealing with any type of chronic pain in their lower or upper back
April 12, 2019
5 months ago
It's SO hard to get out of bed now...
I wake up restful, just not quite ready to climb out of bed yet And it is true what the commercials say about the memory foam. I'm unaware when my babe climbs into bed because my sleep is undisturbed
April 4, 2019
5 months ago
A note about our reviews. Reviews and testimonials from others can be an important factor in making a decision to purchase from us. Raymour & Flanigan Furniture | Mattresses prints both solicited and unsolicited reviews from customers. Customers are eligible to receive an offer if they provide a review of a product purchased from us.
Questions & Answers Back to Features
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Browse 2 questions Browse 2 questions and 4 answers
How firm is it from 1-10 ??
Ricky F on Apr 19, 2019
BEST ANSWER: It;s actually a lot firmer than I expected. In the store, it didn't seem that firm. But, when we got it (for my son) it was surprisingly firm (about an 8/10). He wasn't very happy with the firmness so we put a mattress topper on it.

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