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Your local furniture specialist

King Koil

KING KOIL Grand Harmony Super King Mattress - Medium

  • Reflex Plus Support System using Extra Active Coils
  • Performa Edge for a larger sleep surface and stronger edge
  • Memory Foam which conforms to your body
  • Medium Quilting Comfort Foam
  • Stretch Knit Fabric
  • AeroComfort Technology - AeroQuilt/AeroLatex
  • Approved by the International Chiropractors Association
  • Australian Made
  • 10 Year Warranty
  • *Bed base sold separately
Choosing a comfortable, supportive mattress is the first step towards getting a good night's sleep. The Grand Harmony Super King size mattress is an innovative design incorporating advanced features, including King Koil's patented Reflex technology that dynamically responds to your unique body shape to provide all over support. Secondary active coils are also positioned throughout the support system that target specific areas of the body when increased weight is applied. Each coil is individually encased in a fabric pocket to minimise motion transfer and movement for an uninterrupted night’s sleep. More importantly, this mattress aids proper spinal alignment and promotes a healthy nervous system for improved health and general well-being, that is proudly recommended by the experts, and endorsed by the International Chiropractors Association. This Medium feel mattress is also great for allergy sufferers thanks to the anti-allergen specialty foams that help regulate body temperature and provide long term protection against dust mites, nasty allergens, mould and bacteria for a healthier sleep environment. Proudly Australian made and committed to providing optimal sleep quality that is backed by an impressive 10 year warranty!

Delivery Information

Door-2-Door Delivery

From our store to your door with online tracking.

Pick Up In Store

Collect for FREE from your nearest store.

Zero Contact Delivery

Delivered or collected, contact-free.


Returns Information

Here at Furniture Zone, we want you to be delighted with your purchase. If there is a problem with your order, we want to help you as quickly as possible.

If you purchased the product online, please contact our customer support team either by phoning 1300 423 882 or sending an email to
If you purchased in store, please return to the store you purchased the item from. Along with your product, please bring your invoice and some photo identification, so that we can sort out the problem as quickly as possible for you. If the product is too big to easily bring back into the store, please call the store you purchased the product from to discuss the issue.


Payment Options and Security

Paying Online

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Paying in Store

Payment options may vary from store to store. Please click below for full payment information or contact your local store for more details on what payment options are available