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$949.00
The Sleep Firm mattress has been engineered with high density foam comfort layers and high coil count pocket springs to produce an incomparable sleeping experience.
15 Year Warranty
Our goal is for every customer to be totally satisfied with their purchase. If this isn't the case, let us know and we'll do our best to work with you to make it right.
FREE Shipping*
We will work quickly to ship your order as soon as possible. Once your order has shipped, you will receive an email with further information. Delivery times vary depending on your location.
Awarded Australia Best Firm Mattress
Our products are manufactured both locally and globally. We carefully select our manufacturing partners to ensure our products are high quality and a fair value.
150-night sleep trial
If you don’t love the firmness of our mattress in the first 150 nights of sleeping, then you can return it for a full refund.
Multi-award winning mattress
Multi-awarded as Bedbuyer’s ‘Best Firm Mattress. Awarded for the past 3 years in a row 2023, 2024 & 2025.
Nearly Perfect!
With an average rating of 4.9 stars on productreview.com.au, our happy customers are making themselves heard.
Australia's best firm mattress
Multi-awarded as Bedbuyer’s ‘Best Firm Mattress. Awarded for the past 3 years in a row – 2023, 2024 & 2025.
4.9 stars
With an average rating of 4.9 stars on ProductReview.com.au, our happy customers are making themselves heard.
Endorsed by the Australian Spinal Research Foundation
The Sleep Firm mattress has been officially endorsed by the Australian Spinal Research Foundation.
GECA and Sensitive Choice certified
Achieved GECA and Sensitive Choice certifications, highlighting environmental responsibility and asthma-friendliness.
Choice reviewed
Reviewed and compared by Choice. Read the review.
Australia’s firmest mattress in a box, built for true support and lasting comfort.
At Sleep Firm, we have a single-minded focus – giving the people firmness. We make entirely firm mattresses, from the centre to the firm supportive edge.
Other mattress brands might have a soft mattress and a slightly firmer pocket spring mattress in their range. Not us. We are firm to the core.
42% stronger than standard springs.
At the heart of the Sleep Firm mattress is the S+ Pro 5-Zone Pocket Spring System, engineered for superior support and durability. Each individually encased spring responds independently to body weight and movement, ensuring targeted pressure relief and minimising partner disturbance. With up to 1,326 springs in a King size, the system provides precise spinal alignment and edge-to-edge stability, so sleepers enjoy consistent firmness across the entire surface. Constructed with medical-grade fabric and tested to be up to 42% stronger than standard pocket springs, these springs are built to deliver uncompromising support and long-lasting performance.
S+ Pro 5‑Zone Pocket Spring System
Our 5 Zone S+Pro high spring count mattresses promote the best support for all body types and weights. You won’t find this in a major retail store mattress.
Boomerang foam
Our Boomerang Foam technology is a premium density foam that springs back into place, night after night. Its open cell structure will also keep your sleep environment cool.
5 sleeping zones
Each zone is designed to provide targeted support to different parts of the body, with the goal of promoting proper spinal alignment and reducing pressure points.
Foam box edge
Our quality foam box edge helps prevent roll off. You can rest assured that your firm mattress will continue to provide a high level of sleep quality from edge to edge.
Why Sleep Firm
Sleep Firm was founded with a single-minded goal – to create the best mattress for people who like a firm feel. Through years of research, design, and feedback, we’ve created a sleeping solution that meets the very specific needs of our customers.
Firmness is all we know. You won’t find a better extra firm mattress anywhere in Australia. We are so confident that you’ll love our firm mattress, that we’ll give you 150 nights to try it, totally risk-free.
Just how firm is the Sleep Firm mattress
We’re glad you asked. Let’s put it this way – it’s very firm but not rock hard. We like to define it as enjoyably firm. An enjoyably firm mattress is a mattress that provides a supportive and comfortable sleeping surface while still offering a significant level of firmness. It should have enough resistance to support the natural curves of your body and prevent excessive sinking or sagging, especially around the hips and lower back.
Up to 1326 Springs
High spring count tailored for spinal alignment, with medical‑grade fabric.
The Queen model features 900 springs; King has 1,326.
42% stronger
Our specialised spring technolgoy ensures 42% greater strength than typical pocket springs.
Zoned for trailed firmness
Each zone is designed to provide targeted support to different parts of the body, with the goal of promoting proper spinal alignment and reducing pressure points.
150-night sleep trial
We're so confident that you'll love it that we offer a 150-night sleep trial.
Enjoy sleeping firmer for 150 nights, totally risk-free
If you don’t love the firmness of our mattress in the first 150
nights of sleeping, then you can return it for a full refund.
Don't just take our word for it!
Our customers are firm beleivers in better sleep.
I purchased a sleep firm bed as it’s rating was 9 out of 10 on the mattress firmness scale. I am a tall and large person so wanted a mattress with additional inner springs that catered to my weight and wouldn’t sag. A firmer mattress is better for larger people as you don’t “sink” into the mattress and feel like you are not lying straight. This mattress has delivered. Firm, supportive, comfortable (if you like a very firm bed, which I do). Would recommend. It’s a heavier mattress due to the extra springs in it, so getting it out of the box and onto the bed was tricky for one person. Would be great if mattresses had handles on the side like they used to.
This mattress was purchased for a guest bedroom. Whilst I have not used it (yet), several guests have stayed and all rated it very comfortable. One guest was rehabilitating from spinal surgery. I am glad that I could offer them good nights' sleep. My enjoyment came from opening it and watching it puff up!! It was easy enough for one person to manage.
I love this mattress so much! I have had back problems for since I was in grade school and never quite found a mattress that my spine agreed with. We bought our Sleep Firm King 1 month after we had our first son because we found ourselves uncomfortable and cramped in between animals and a baby and more sleep deprived than ever. This mattress was our saving grace. It is the firmest mattress I have had the pleasure of sleeping on and has helped my back problems tenfold, even with all of the aches and pains that come post partum. It is so roomy and comfortable, I truly recommend this mattress to anyone that is looking for a firm change!
This mattress has completely changed my sleep! I’ve struggled with restless nights and constant lower back pain for years, and no mattress ever seemed to help. We decided to try the Sleep Firm Queen after moving into our new house, and honestly, it’s been a life saver. The support is incredible—it’s the firmest mattress I’ve ever owned, and my back pain has eased more than I thought possible. Even after long days on my feet, I wake up refreshed and without aches. It’s comfortable, supportive, and truly everything I was looking for. I recommend it to anyone who wants real firmness and real relief
I can’t say enough good things about this mattress! I’ve always preferred a firmer bed but struggled to find one that was truly supportive without feeling like a rock. The Sleep Firm King has been amazing—it feels solid, supportive, and still comfortable night after night. My partner and I both sleep so much better, and my morning back stiffness is practically gone. If you’re searching for a mattress that delivers real firmness and lasting comfort, this is the one.
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Frequently asked questions
What is our 150-night trial?
We give you 150 nights to test out our firm mattress totally risk-free. This means that if you are unsatisfied with your mattress, you can return it for a full refund. All returned mattresses are donated to our charity partner the Salvos to help those in need or sent to a mattress recycler.
We always recommend trying the mattress for at least 14 nights before sending it back to us. Some mattresses take some getting used to, especially super firm ones like ours!
Please note the trial is limited to one return 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.
How do I organise a return?
If you would like to return your mattress, please complete the contact form by clicking here.
Once your return request is sent to us, we will then arrange for it to be collected by Salvos free of charge, and once the collection is completed, we will give you a full refund.
Return is free in all Metro location (Melbourne, Sydney, Canberra, Brisbane, Gold Coast, Adelaide, Hobart & Perth). If you live in a regional, rural or an area outside of Salvos network we will ask you for assistance in donating/dropping off the mattress directly to your closest charity or mattress recycler and email us proof of donation/drop off and we will give you a full refund.
As our returned mattresses are sent to charities to live a new life, they must be in as-new condition with no damage, stains, marks or rips. We highly recommend using a mattress protector to ensure this, should you wish to return it.
How much is delivery?
Delivery is free to eligible metro and inner regional areas, provided your location is serviced by our delivery partners.
How does delivery work?
Once your order is complete, your product will be dispatched from our Melbourne warehouse, and will be delivered to you based on the average* delivery times below:
- Melbourne Metro within 5 business days
- Sydney, Brisbane, Adelaide & Canberra Metro within 14 business days
- All other areas within 21 business days.
Business days are defined as Monday to Friday and exclude weekends and public holidays. From time to time, the lead time may be longer depending on the location.
IMPORTANT
- The delivery service is to the Front Door of a Ground Floor dwelling ONLY. Depending on your location/delivery address you may be asked to help the driver to unload the mattress from the back of the truck/ute/van.
- Our delivery partners do not take items indoors or upstairs.
Next business day Melbourne mattress delivery
If you order our SLEEP FIRM Mattress before 2pm AEDT and live in selected Melbourne suburbs, you will receive it next business day*!
Next Day Delivery Scheduling
Monday Delivery
Any orders placed after 2pm on Thursday to 2pm Friday
Tuesday Delivery
Any orders placed after 2pm on Friday to 2pm Monday
Wednesday Delivery
Any orders placed after 2pm on Monday to 2pm Tuesday
Thursday Delivery
Any orders placed after 2pm on Tuesday to 2pm Wednesday
FRIDAY Delivery
Any orders placed after 2pm on Wednesday to 2pm Thursday
*Business day is defined as Monday to Friday and excludes public holidays.
Which Melbourne suburbs qualify for next-business-day mattress delivery?
Abbotsford 3067 Carlton North 3054 Footscray 3011 McKinnon 3204 Seaholme 3018
Aberfeldie 3040 Carnegie 3163 Forest Hill 3131 Meadow Heights 3048 Seddon 3011
Aintree 3336 Caroline Springs 3023 Fraser Rise 3336 Melbourne Airport 3045 Somerton 3062
Airport West 3042 Carrum 3197 Gardenvale 3185 Melbourne 3000 South Kingsville 3015
Albanvale 3021 Caulfield East 3145 Gladstone Park 3043 Melbourne 3004 South Melbourne 3205
Albert Park 3206 Caulfield North 3161 Glen Huntly 3163 Melbourne 3004 South Morang 3752
Albion 3020 Caulfield South 3162 Glen Iris 3146 Melton South 3338 South Wharf 3006
Alphington 3078 Caulfield 3162 Glen Waverley 3150 Melton West 3337 South Yarra 3141
Alphington 3078 Chadstone 3148 Glenroy 3046 Melton 3337 Southbank 3006
Altona Meadows 3028 Chelsea Heights 3196 Gowanbrae 3043 Mentone 3194 Spotswood 3015
Altona North 3025 Chelsea 3196 Grangefields 3335 Mernda 3754 Springvale South 3172
Altona 3018 Cheltenham 3192 Greensborough 3088 Middle Park 3206 Springvale 3171
Ardeer 3022 Chirnside Park 3116 Greenvale 3059 Mill Park 3082 St Albans 3021
Armadale 3143 Clarinda 3169 Hadfield 3046 Mitcham 3132 St Helena 3088
Ascot Vale 3032 Clayton South 3169 Hallam 3803 Mont Albert 3127 St Kilda East 3183
Ashburton 3147 Clayton 3168 Hampton East 3188 Montmorency 3094 St Kilda West 3182
Ashwood 3147 Clifton Hill 3068 Hampton Park 3976 Moonee Ponds 3039 St Kilda 3182
Aspendale Gardens 3195 Cobblebank 3338 Hampton 3188 Moorabbin Airport 3194 Strathmore Heights 3041
Aspendale 3195 Coburg North 3058 Harkaway 3806 Moorabbin 3189 Strathmore 3041
Attwood 3049 Coburg 3058 Harkness 3337 Mooroolbark 3138 Strathtulloh 3338
Avondale Heights 3034 Cocoroc 3030 Hawthorn East 3123 Mordialloc 3195 Sunbury 3429
Balaclava 3183 Collingwood 3066 Hawthorn 3122 Mount Cottrell 3024 Sunshine North 3020
Balwyn North 3104 Coolaroo 3048 Heatherton 3202 Mount Waverley 3149 Sunshine West 3020
Balwyn 3103 Craigieburn 3064 Heathmont 3135 Mulgrave 3170 Sunshine 3020
Bangholme 3175 Cremorne 3121 Heidelberg Heights 3081 Murrumbeena 3163 Surrey Hills 3127
Bayswater North 3153 Croydon Hills 3136 Heidelberg West 3081 Narre Warren East 3804 Surrey Hills 3127]
Bayswater 3153 Croydon North 3136 Heidelberg 3084 Narre Warren North 3804 Sydenham 3037
Beaconsfield 3807 Croydon South 3136 Highett 3190 Narre Warren South 3805 Tarneit 3029
Beaumaris 3193 Croydon 3136 Highett 3190 Narre Warren 3805 Taylors Hill 3037
Bellfield 3081 Dallas 3047 Hillside 3037 Newport 3015 Taylors Lakes 3038
Bentleigh East 3165 Dandenong North 3175 Hoppers Crossing 3029 Niddrie 3042 Templestowe Lower 3107
Bentleigh 3204 Dandenong South 3175 Hughesdale 3166 Noble Park North 3174 Templestowe 3106
Berwick 3806 Dandenong 3175 Huntingdale 3166 Noble Park 3174 Thomastown 3074
Black Rock 3193 Deanside Hurstbridge 3099 North Melbourne 3051 Thornbury 3071
Blackburn North 3130 Deepdene 3103 Ivanhoe East 3079 Northcote 3070 Thornhill Park 3335
Blackburn South 3130 Deer Park 3023 Ivanhoe 3079 Notting Hill 3168 Toolern Vale 3337
Blackburn 3130 Delahey 3037 Jacana 3047 Nunawading 3131 Toorak 3142
Bonbeach 3196 Derrimut 3026 Kealba 3021 Oak Park 3046 Tottenham 3012
Bonnie Brook 3335 Diamond Creek 3089 Keilor Downs 3038 Oakleigh East 3166 Travancore 3032
Boronia 3155 Diggers Rest 3427 Keilor East 3033 Oakleigh South 3167 Truganina 3029
Box Hill North 3129 Dingley Village 3172 Keilor Lodge 3038 Oakleigh 3166 Tullamarine 3043
Box Hill South 3128 Docklands 3008 Keilor North 3036 Ormond 3204 Vermont South 3133
Box Hill 3128 Doncaster East 3109 Keilor Park 3042 Park Orchards 3114 Vermont 3133
Braeside 3195 Doncaster 3108 Keilor 3036 Parkdale 3195 Viewbank 3084
Braybrook 3019 Donvale 3111 Kensington 3031 Parkville 3052 Wantirna South 3152
Briar Hill 3088 Doreen 3754 Kew East 3102 Parwan 3340 Wantirna 3152
Brighton East 3187 Doveton 3177 Kew 3101 Pascoe Vale South 3044 Warrandyte South 3134
Brighton East 3187 Eaglemont 3084 Keysborough 3173 Pascoe Vale 3044 Warrandyte 3113
Brighton 3186 East Melbourne 3002 Kilsyth South 3137 Patterson Lakes 3197 Warranwood 3134
Broadmeadows 3047 Edithvale 3196 Kilsyth 3137 Plenty 3090 Waterways 3195
Brookfield 3338 Elsternwick 3185 Kings Park 3021 Plumpton 3335 Watsonia North 3087
Brooklyn 3012 Eltham North 3095 Kingsbury 3083 Point Cook 3030 Watsonia 3087
Brunswick East 3057 Eltham North 3095 Kingsville 3012 Port Melbourne 3207 Weir Views 3338
Brunswick West 3055 Eltham 3095 Knoxfield 3180 Prahran 3181 Werribee South 3030
Brunswick 3056 Elwood 3184 Kooyong 3144 Preston 3072 Werribee 3030
Bulla 3428 Endeavour Hills 3802 Kurunjang 3337 Princes Hill 3054 West Footscray 3012
Bulleen 3105 Epping 3076 Lalor 3075 Ravenhall 3023 West Melbourne 3003
Bundoora 3083 Essendon Fields 3041 Laverton North 3026 Research 3095 Westmeadows 3049
Bundoora 3083 Essendon North 3041 Laverton 3028 Reservoir 3073 Wheelers Hill 3150
Burnley 3121 Essendon West 3040 Lower Plenty 3093 Richmond 3121 Wildwood 3429
Burnside Heights 3023 Essendon 3040 Lynbrook 3975 Ringwood East 3135 Williams Landing 3027
Burnside 3023 Eumemmerring 3177 Lyndhurst 3975 Ringwood North 3134 Williamstown North 3016
Burwood East 3151 Exford 3338 Lysterfield South 3156 Ringwood 3134 Williamstown 3016
Burwood 3125 Eynesbury 3338 Lysterfield 3156 Ripponlea 3185 Windsor 3181
Cairnlea 3023 Fairfield 3078 Macleod 3085 Rockbank 3335 Wonga Park 3115
Calder Park 3037 Fawkner 3060 Maidstone 3012 Rosanna 3084 Wyndham Vale 3024
Camberwell 3124 Ferntree Gully 3156 Malvern East 3145 Rowville 3178 Yallambie 3085
Campbellfield 3061 Fieldstone 3024 Malvern 3144 Roxburgh Park 3064 Yarraville 3013
Canterbury 3126 Fitzroy North 3068 Mambourin 3024 Sandringham Yuroke 3063
Carlton North 3054 Fitzroy 3065 Manor Lakes 3024 Scoresby 3179
Carlton 3053 Flemington 3031 Maribyrnong 3032 Seabrook 3028
How do I unpack my mattress?
The Sleep Firm mattress comes with opening instructions. You simply open the blue outer wrapper with scissors without puncturing the inner vacuum bag. The mattress then unfurls on its own. The mattress can take up to 72 hours to return back to the shape it was in the factory.
Where is the mattress made?
The Sleep Firm mattress is manufactured in Melbourne, by Chiropedic who have decades of experience in making and selling over 100,000 mattresses around Australia.
Do I need to rotate the mattress?
We recommend rotating your mattress twice in the first month after purchase and then once per month throughout the warranty period.
For single-sided mattresses, spin 180 degrees (head to toe). For double-sided mattresses (where the sleep surface is identical on the top and bottom), flip over and spin 180 degrees.
