Sleep Firm

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Hand-crafted in Melbourne by Chiropedic with over 30 years of mattress-making expertise, the Sleep Firm delivers genuine 9-out-of-10 firm support without ever feeling like you're sleeping on the floor. Designed for sleepers who want true firm support — back sleepers, stomach sleepers, larger frames, those with lower-back issues, and anyone who has woken sore on a soft or sagging mattress for years. The S+ Pro 5-Zone Pocket Spring System and exclusive Boomerang® Foam combine to deliver the strongest, most stable spinal alignment available in a mattress-in-a-box. Why people choose the Sleep Firm Mattress 🏆 Australia's Best Firm Feel Mattress in a Box — 3 years running The Sleep Firm Mattress has been independently awarded "Australia's Best Firm Feel Mattress in a Box" by BedBuyer in 2024, 2025 and 2026 — the most respected independent mattress review platform in Australia. BedBuyer rated it 9/10 on the firmness scale and called it "as comfortable as you will get at this level of firmness". 💪 S+ Pro 5-Zone Pocket Spring System — 42% stronger than standard springs At the core is the exclusive S+ Pro 5-Zone Independent Spring System. Each spring is individually wrapped in N-100 medical-grade fabric, tested to be up to 42% stronger than a standard pocket spring. The 5 zones provide firm support exactly where your body needs it — head, lower back, hips and feet — with slight pressure relief at the shoulders and knees for comfort. 🔢 Super-high pocket spring count for every size The Sleep Firm scales its spring count with mattress size — bigger sizes get more springs, not the same springs spread further apart. That means consistent firm support whichever size you choose: Single: 576 springs King Single: 741 springs Double: 900 springs Queen: 1,092 springs King: 1,326 springs 🧱 Exclusive Boomerang® Foam — high-rebound, long-lasting firm comfort Above the S+ Pro spring is the Sleep Firm's exclusive Boomerang® Foam by Dunlop — engineered specifically for a mattress-in-a-box with an extremely high rebound that does not lose its firmness over time. Boomerang Foam is GECA certified, treated with Ultra-Fresh anti-microbial protection, and approved by the National Asthma Council's Sensitive Choice® program — a better choice for people with asthma or allergies. BedBuyer verdict: "If you're after a distinct firm feel to your mattress, the Sleep Firm Mattress should be at the top of your list. It is Australian made, has excellent support, and is competitively priced. Stable, balanced, and partner disturbance is very minimal. Spinal support is outstanding." 🌬️ Bekaert Deslee Adaptive cover & 3D spacer fabric sides The sleep surface is a Bekaert Deslee 'Adaptive' Fabric cover — soft, breathable, and designed to keep you cool and dry through the night. Beneath the cover sits a layer of Quiltec foam that minimises body impressions in the quilting. The sides use 3D spacer fabric for maximum air circulation, keeping the whole mattress fresh, dry and temperature-balanced. 🩺 Endorsed by the Australian Spinal Research Foundation The Sleep Firm Mattress has been independently assessed and endorsed by licensed chiropractors through the Australian Spinal Research Foundation for its ergonomic design, function, and ability to support natural spinal alignment. 🛏️ Edge-to-edge firm support Unlike most firm mattresses that soften at the edges, the Sleep Firm is built with a full foam-box construction that delivers edge-to-edge stability — usable sleeping surface right to the perimeter, no roll-off, no sag, no soft spots. Compare the Sleep Firm range Three mattresses, one Australian-made firm-mattress family. The standard Sleep Firm is the original 9/10 firm award winner. Sleep Firm Ultra takes it to 9.5/10 with a double layer of Boomerang Foam for the firmest profile available. Sleep Firm Luxe dials back to 7/10 medium-firm with a CloudGel™ Italian gel-foam top layer for side and hot sleepers who still want firm spinal support. Feature Sleep Firm You're viewing Sleep Firm Ultra Sleep Firm Luxe Firmness 9/10 — Firm 9.5/10 — Extra Firm 7/10 — Medium-Firm Best for All sleepers wanting genuine firm support — especially back & stomach sleepers Back & stomach sleepers, larger frames, anyone wanting maximum firmness Side & hot sleepers who still want firm spinal support with a softer top feel Height 26 cm 28 cm 30 cm Spring system S+ Pro 5-Zone Pocket Spring S+ Pro 5-Zone Pocket Spring (reinforced) S+ Pro 5-Zone Pocket Spring Springs (King size) 1,326 1,326 1,326 Comfort layer Boomerang® Foam Double layer Boomerang® Foam CloudGel™ Italian Gel Foam + Boomerang® Foam Temperature regulation Open-cell foam + 3D spacer sides Open-cell foam + 3D spacer sides Advanced CloudGel™ cooling Next-day delivery (Sydney & Wollongong) Double, Queen, King ✓ Queen & King ✓ Queen & King ✓ Trial 150 Night Sleep Trial 100 Night Comfort Guarantee 100 Night Comfort Guarantee Warranty 15 years 15 years 15 years Certifications GECA · Sensitive Choice® · Spinal Foundation GECA · Sensitive Choice® · Spinal Foundation GECA · Sensitive Choice® · Spinal Foundation Award 🏆 BedBuyer 2024 · 2025 · 2026 Australia's Best Firm — — Certifications & endorsements Hand-crafted in Melbourne GECA Certified Foam Sensitive Choice® Approved ASRF Endorsed Also certified: Ultra-Fresh anti-microbial treated (sleep surface), N-100 Medical Grade Fabric (spring encasement), and built to support up to 500 kg combined weight on the Queen model. Sizes, dimensions & spring counts Five sizes available. Spring count scales up with each size so support stays firm and consistent however big you go. Size Dimensions (W × L × H) Springs Weight Delivery to Sydney & Wollongong Single 92 × 188 × 26 cm 576 27 kg Made-to-order · 7–14 days King Single 107 × 203 × 26 cm 741 32 kg Made-to-order · 7–14 days Double 138 × 188 × 26 cm 900 38 kg FREE next-business-day ✓ Queen 153 × 203 × 26 cm 1,092 45 kg FREE next-business-day ✓ King 183 × 203 × 26 cm 1,326 54 kg FREE next-business-day ✓ Weight capacity: Tested to handle a combined nightly sleeping weight of up to 500 kg+ on the Queen mattress. Suited to all body types, including larger frames and couples where one partner is significantly heavier than the other. Warranty & 150 Night Sleep Trial 🛡️ 15-Year warranty Every Sleep Firm Mattress comes with a 15-year warranty against faulty workmanship or materials, backed directly by Chiropedic Bedding and Best in Beds. 🌙 150 Night Sleep Trial — totally risk-free We're so confident you'll love your Sleep Firm Mattress that we offer a full 150-night sleep trial. If it's not the right firmness for you in those 150 nights, you can return it for a full refund or exchange it for another mattress in our range. We do recommend sleeping on it for at least 14 nights first so your body has time to adjust to the new support. Trial mattresses are donated to our charity partner, the Salvation Army. Free return collection in all metro areas (Sydney, Melbourne, Canberra, Brisbane, Gold Coast, Adelaide, Hobart & Perth). One swap or return per household. Always use a mattress protector — it's required to preserve the trial and warranty. Just call 1300 399 676 or message our team and we'll arrange it. Recommended bed base To preserve the firm support and warranty, the Sleep Firm Mattress must sit on a solid, supportive bed base: Slatted frames are fine — but slats must be solid (not flexible / posture) and spaced no more than 8 cm apart Ensemble bases, solid platform beds and good-quality timber/metal frames all work well Flexible "posture" slats, adjustable electric bed bases, or any unsupportive foundation will void the warranty Not sure if your existing base is suitable? Contact our team and we'll help you check before you order. Browse the full Sleep Firm range Sleep Firm Luxe → 7/10 medium-firm with CloudGel™ Italian gel-foam top — ideal for side and hot sleepers who still want firm spinal support. Sleep Firm Ultra → 9.5/10 extra-firm with a double layer of Boomerang® Foam — the firmest mattress-in-a-box you can buy in Australia. Full Sleep Firm collection → Compare all three Sleep Firm models, pricing, and accessories in one place. Firm mattress buying guide → Read why a firm mattress matters for back support, stomach sleepers, and long-term spinal alignment. FREE Australia-wide delivery 🚚 FREE next-business-day delivery — Sydney & Wollongong (Double, Queen, King) Order before 2 pm AEDT any business day and we'll dispatch your in-stock Double, Queen or King Sleep Firm for next-business-day delivery across Greater Sydney and Wollongong — Western Sydney, South-West Sydney, North Shore, Inner West, Eastern Suburbs, the Hills District, the Sutherland Shire and the Illawarra all included. Every mattress arrives compressed in a box, ready to unbox onto your bed base. 📦 Made-to-order in 7–14 days — Single & King Single sizes Single and King Single Sleep Firm mattresses are made-to-order in Melbourne by Chiropedic and shipped free Australia-wide within 7–14 business days. We always ship as quickly as we can — usually faster than the upper estimate. 📦 FREE Australia-wide road express shipping Free road express shipping Australia-wide on every Sleep Firm Mattress, dispatched via Allied Express or FedEx straight to your front door: Melbourne, Brisbane, Adelaide & Canberra Metro — within 7–14 business days Regional NSW & all other Australian areas — up to 21 business days (usually quicker) 🏪 24-hour Click & Collect from any showroom Prefer to pick up? Click & Collect is available within 24 hours from any of our three NSW showrooms: Best in Beds Campbelltown — 20 Blaxland Road, Campbelltown (Macarthur / South-West Sydney) Best in Beds Prospect — 27 Rowood Road, Prospect (Western Sydney) Best in Beds Warrawong — 91-95 King Street, Warrawong (Wollongong / Illawarra) Combined orders: if you purchase a bed or another item alongside your Sleep Firm Mattress, all items will be delivered together based on the ETA of the second item. Need the mattress urgently? Contact us and we'll arrange a separate dispatch. Local Sleep Firm delivery & showroom pages Looking for Sleep Firm delivery info for your area? Visit your local page: Sleep Firm Mattress Sydney Sleep Firm Mattress Parramatta Sleep Firm Mattress Wollongong Sleep Firm Mattress Campbelltown · Prospect · Warrawong Australia's Best Firm Mattress — NSW hub Mattress care Always use a quality mattress protector — it preserves the cover and the warranty Rotate twice in the first month after purchase, then once per month thereafter The Sleep Firm is single-sided — spin 180° head-to-toe, no need to flip Spot-clean stains by gently dabbing with a damp cloth — avoid solvents and don't over-wet Allow up to 72 hours after unboxing for the mattress to fully expand to its factory shape Keep the room well ventilated — natural airflow helps the foams breathe Need help choosing between Sleep Firm, Sleep Firm Luxe and Sleep Firm Ultra? Call our team on 1300 399 676 or visit any of our three NSW showrooms — all three Sleep Firm models are on display so you can feel the difference in person. Show more