• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer
Bedbuyer

Bedbuyer

Expert mattress reviews

  • best mattresses
    • best mattress in a box
    • best in retail
    • best for back pain
    • best for side sleepers
    • best for hot sleepers
    • best for heavy people
    • best by price
      • best under $600
      • best under $1200
      • best under $2000
      • best under $5000
    • ★ 2025 Award Winners
  • mattress reviews
    • mattress in a box
    • retailers
    • ♡ best sellers
    • ✄ hot deals
    • ☀︎ australian made
    • ✓ recommended
    • bundles
  • kids & babies
    • kids mattress reviews
    • kids beds
    • bunk beds
    • cot mattress reviews
    • cots & bassinets
    • linen & pillows
  • accessories
    • pillows
    • bed bases
    • mattress protectors
    • mattress toppers
    • bed sheets
    • quilt & quilt covers
    • blankets
  • lifestyle
    • sofa beds
    • adjustable beds
    • pregnancy & maternity
    • sofas & chairs
    • ergonomic
    • dog beds
  • more info
    • blog articles
    • bed sizes
    • about us
    • review process
    • disclaimer
    • contact us

King Koil Platinum Luxury Serenity Firm

The King Koil Platinum Luxury Serenity Firm is a great mattress that has plenty of comfort. Its quality and craftsmanship is outstanding.

Bedbuyer's Rating
$6,599 (Queen)Shop now

Last updated: November 18, 2021

Last updated: November 18, 2021

King Koil Platinum Luxury Serenity Firm

King Koil Platinum Luxury Serenity Firm Review

The King Koil Platinum Luxury Serenity Firm is a sophisticated, innerspring mattress that also comes in an ultra firm, medium, and plush version.

Purchase and delivery

This mattress can be ordered online through the Forty Winks website. It can also be purchased through any of Forty Winks’ stores across Australia.

Delivery is available Australia-wide but delivery fees (and times) do vary. Online delivery fees are based on your location from the nearest store, and delivery times will depend on stock availability. For more details, see our ‘Delivery’ section below.

Visually, the King Koil Platinum Luxury Serenity Firm presents with a simple but classic style. It uses a grey and white colour theme and its finishings demonstrate a high level of refinement.

Comfort and support

The top comfort layer of this mattress includes a number of materials including AeroQuilt, AeroFoam, Talalay latex, and FlexGel Infused Latex. It also includes a layer of ‘Micro Comfort Coils’ to help with body contouring.

This rather fancy top layer feels soft, light, and comfortable and offers lovely pressure relief. This mattress should suit all sleeping positions (side sleepers, back sleepers, and stomach sleepers) but this suitability will vary between individuals.

King Koil Platinum Luxury Serenity Firm

Despite this mattress being a firm version, we rated it as a ‘medium’ feel and a 5 / 10 on the firmness scale. Please note that our firmness ratings are just a guide and they do not necessarily relate to comfort. Furthermore, our firmness ratings are assigned based on Bedbuyer’s testing process and these may differ from firmness ratings given by individual companies.

The spring system used in the King Koil Platinum Luxury Serenity Firm is a Reflex Platinum Support System. This spring unit feels robust and will accomodate people of all sizes. It offers excellent spinal support assuming that the firmness option chosen is suitable for your body type.

The King Koil Platinum Luxury Serenity Firm responds nicely to normal sleep movements. In basic terms, this means that changing sleep positions (and intimate activities) shouldn’t be any trouble.

Please note that our responsiveness scales are just a guide and preferred responsiveness levels will vary between individuals. It’s worth noting also that innerspring mattresses are generally more responsive than foam mattresses.

The finer details

In terms of build quality and craftsmanship, the King Koil Platinum Luxury Serenity Firm is outstanding. Edge support is good, thanks to its Performa Edge Support. This means that you should be able to use the entire surface of the mattress.

This mattress also isolates motion well, so a restless partner shouldn’t be any problem.

King Koil Platinum Luxury Serenity Firm

The mattress has a 10-year warranty – a perfect example of A.H. Beard’s  confidence in its product.

What bed base should I use?

As with most mattresses, we recommend the King Koil Platinum Luxury Serenity Firm to be used with a solid bed frame (such as the Sleep Republic Pro Base), or a solid ensemble base (with the slats no longer than 8 cm apart).

A bed frame (with flexible slats) may still be adequate, but again, we strongly recommend that the distance between each slat is less than 8 cm. Use of an unsupportive mattress foundation will usually void the mattress warranty.

Sleep Republic Pro Base

Furthermore, we do not recommend the King Koil Platinum Luxury Serenity Firm to be used with an adjustable (electric) bed base. Here is our full list of mattresses that are compatible with an adjustable bed base.

It’s worth noting here that mattress firmness, performance, and durability will vary with different bed bases.

Available sizes

The King Koil Platinum Luxury Serenity Firm is available in 7 sizes (super king, king, queen, double, king single, long single and single ) so it should suit all sleeping arrangements.

Here are Australia’s standard bed (mattress) sizes in 2021.

Final verdict

The King Koil Platinum Luxury Serenity Firm is a great mattress that has plenty of comfort. Its quality and craftsmanship is outstanding and it comes with the added security of a 10 year warranty.

Bedbuyer’s rating:  4.5 / 5

Here are our ratings for each category:

Comfort
Spinal Support
Build Quality
Partner Disturbance
Value for Money

Did you know? Bedbuyer recently announced Australia’s Top 10 Mattresses for 2021.

If you have any questions about this mattress, leave a comment below or please contact us!


In a nutshell 🥜

  • Medium feel
  • Excellent build quality
  • Australian made
  • 10 year warranty

Recommended Retail Price

Queen Mattress: $6,599

Warranty

10 years

Delivery

Online Delivery fees

Your final delivery fees will get calculated based on your delivery address during the checkout. The closer your delivery address to the delivering store, the lower the delivery fees.

Standard Delivery

For large items or large and small items combined:

For large items or large and small items combined:

  • 0-20km : $80
  • 20-100km : $100
  • For delivery over 100km, contact your local store for a custom quote.

Specifications – King Koil Platinum Luxury Serenity Firm

  • Weight of mattress: TBC kgs (Queen Mattress)
  • Mattress Height: TBC cm

Sleep in serenity

The King Koil Platinum Luxury Serenity range contains two elements of our advanced comfort technology, AeroComfort; AeroQuilt and AeroFoam, providing breathable, pressure relieving comfort that is more resilient to body signatures.

Features premium comfort components such as Memory Foam and FlexGel to provide pressure relieving, conforming comfort.

Micro Comfort Coils to provide additional support or enhanced comfort whilst minimising partner disturbance.

Support

The Reflex Platinum support system features maximum Active coils for all over support and pressure relief. Active coils, which are spread throughout the support system, are incorporated into the primary coils to provide progressive resistance and enhanced support wherever your body needs it.

Each spring is individually enclosed in a perforated casing allowing for increased breathability for a healthier sleep environment.

Encased in a Performa Edge Support to provide a large sleeping surface and a strong mattress edge.

Category iconForty Winks

Subscribe
Notify of
guest

guest

10 Comments
Inline Feedbacks
View all comments

Primary Sidebar

contact us
  • ♡ best sellers
  • ✄ hot deals
  • ★ 2025 award winners
  • ✓ recommended
  • sofa beds
  • adjustable compatible
  • best retail mattresses
  • best mattress in a box
  • latex mattresses

Get exclusive discounts

Hot deals on Australia's best mattresses!

Hot deals ✂︎

Footer

Browse

  • best sellers ♡
  • hot deals ✄
  • bundles 💰
  • recommended ✔︎

Support

  • bed sizes
  • disclaimer
  • review process
  • about us
  • Facebook
  • Instagram
  • YouTube
.

© Bedbuyer Pty Ltd 2025  |  Disclaimer  |  Website by Clear Space Studio