Sleep Firm Ultra
Expected Delivery from - .
Awarded Australia’s BEST FIRM FEEL MATTRESS by BedBuyer in 2025
Buy the Sleep Firm mattress online with confidence or visit us in store to try them yourself
Long Single Mattress: 203cm x 92cm
King Single Mattress: 203cm x 107cm
Double Mattress: 188cm x 138cm
Queen Mattress: 203cm x 153cm
King Mattress: 203cm x 183cm
Super King Mattress: 203cm x 203cm
Sleep Firm Ultra
AUSTRALIA'S BEST FIRM FEEL MATTRESS IN 2025
Designed for advanced strength and spinal alignment, the 5 Zone S+Pro high spring count mattresses promote the best support for all body types and weights. You won’t find this in other retail mattress stores.
Quality constructionThe Australian-made Sleep Firm mattresses feature proprietary Boomerang foam, which is specially formulated to instantly rebound to its original shape for years of consistent firm support.They come with a 15-year warranty that you can trust. Made in Australia by Chiropedic Bedding who have 30 years of expertise in manufacturing Australia’s best mattresses.
Australian Spinal Research FoundationThe Sleep Firm mattresses have been assessed by licensed Chiropractors as being of high quality in relation to ergonomic design, function, and for its propose use.
SLEEP FIRM DETAILS
Ultra Firm Mattress
Experience unparalleled firmness with the Sleep Firm Ultra, engineered to deliver a genuine 10/10 on the firmness scale - the ultimate in rock-solid support. Made in Australia for those who demand zero compromise on stability and no sinking sensation, it offers a supremely firm platform that maintains optimal spinal alignment all night long.

Featuring robust extra-firm coils paired with dual layers of high-density Boomerang foam, this mattress ensures a consistently sturdy, secure, and edge-to-edge supportive feel that's both reliable and invigorating. Perfect for back and stomach sleepers, or anyone seeking the pinnacle of firmness, it sets a new standard for what a truly unyielding bed can be.
100 NIGHT COMFORT GUARANTEE
Our mattress experts will always do their best to educate our customers on which mattress is most suitable to them based on their needs, however we understand that if you are unable to get to a showroom, purchasing online can occasionally result in the wrong mattress being selected.
To ensure our customers are completely satisfied with their purchase, Best in Beds is pleased to offer a 100 Night Mattress Comfort Guarantee across our Sleep Firm Ultra & Sleep Firm Luxe mattresses.
To guarantee we get you sleeping on the right mattress, our customers are entitled to exchange their mattress within the 100 Nights from the original order delivery date. You simply need to meet the requirements outlined below.. However, we do suggest to our customers, to sleep on the new mattress for a minimum of 14 nights before deciding on an exchange. This ensures the body has had some time to adjust to the new mattress. All returned mattresses are donated to our charity partner the Salvos to help those in need. Return shipping is free in all Metro location (Melbourne, Sydney, Canberra, Brisbane, Gold Coast, Adelaide, Hobart & Perth). If you are outside these metro locations, we will try to locate a charity in your area who can pick up your mattress. If we are unable to locate a charity that services your area, then you will need to arrange at your cost, to get the mattress to them or to a nominated depot in your closest metro location. As all 100 night guarantee returned mattresses go to charity, to live another life, they must be in an as-new condition with no damage, stains, marks or rips. All the customers should retain the original packaging of the mattress at least for 100 nights to use it during the return process. We highly recommend using a mattress protector with your mattress. If you choose to swap over the mattress, then you will need to pay the difference in price if it is more expensive alternatively we will issue you with a store credit the difference in price if it is cheaper. Please note the guarantee is limited to one mattress swap per household, delivery address or order. If you need to purchase multiple mattresses, we recommend buying one first to make sure you are happy then placing another order.WARRANTY
DELIVERING YOUR SLEEP FIRM
We deliver all of our local orders in Sydney & NSW South Coast with our delivery drivers. Nationally we send all our beds and mattresses and linen Australia wide via Allied Express or Fedex to the front door of your house or apartment building.
How long does it take to deliver?Estimated delivery dates for "In Stock" items are displayed below the ADD TO CART button on each product page. If an item is set to PRE-ORDER or OUT OF STOCK please feel free to click the Enquiry button or call our stores on 1300 399 676 if you'd like more help.
Can I return the purchase?Yes, any Sleep Firm Ultra or Luxe mattress purchased online at bestinbeds.com.au are covered by our 100 Night Mattress Comfort Guarantee & can be exchanged if it's not right for you. Please feel free to click the Enquiry button or call our stores on 1300 399 676 if you'd like more help.
MATTRESS DIMENSIONS
MATTRESS CARE
Try the Sleep Firm
Visit our experienced team in store
CAMPBELLTOWN
20 Blaxland Road
Campbelltown, NSW
(02) 4628 1266PROSPECT
27 Rowood Road
Prospect, NSW
(02) 8676 7321WARRAWONG
91-95 King Street
Warrawong, NSW
(02) 4274 3485EXPRESS DELIVERY
Express Delivery on Sleep Firm Mattresses






















