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King Koil

KING KING KOIL Grand Harmony Single Mattress Firm

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  • 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
  • Firm Comfort Foam Layers
  • Stretch Knit Fabric
  • AeroComfort Technology - AeroQuilt/AeroLatex
  • Approved by the International Chiropractors Association
  • Australian Made
  • 10 Year Warranty
  • *Bed base sold separately
The King Koil Grand Harmony Single mattress is designed to provide optimal comfort and support for growing bodies using the latest in sleep technology. The Primary coils gently conform to the body shape whilst the extra Reflex Plus Active coils provide additional support targeting the hips, shoulders, lower lumbar and waist area. Each spring is individually enclosed in a perforated casing allowing increased breathability for a healthier sleep environment. Equally important is the Performa Edge around the perimeter of the mattress, providing a stronger and more robust encased edge that maximises the useable sleep area. This firm feel mattress is engineered with advanced AeroComfort layers of AeroQuilt and AreoLatex to provide breathable pressure relieving qualities making it more resilient to body impressions. This combined with other quilting and memory foam properties, helps cradle and conform to the body, to relieve pressure points and promote a quality nights sleep. Proudly Australian made, the King Koil Grand Harmony Single mattress is approved by the International Chiropractors Association and comes with a 10 Year manufacturer's warranty.
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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.

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