Sleeping Duck Mattress Review

Sleeping Duck is an Australian bed-in-box brand founded by engineers. It sells the customizable Mach II hybrid through its US store, run by Sleeping Duck Inc with a California-based service team. A bamboo cover, AirGrown foam and zoned pocket springs sit behind a 100-night trial and a 10-year warranty. It's best if you're a couple who wants a different firmness on each side. The big caveat is that US pricing and policy details are thinly published.

If you sleep on your side, choose Medium or Soft inserts for pressure relief. Split Half-Half fixes a firmness gap between partners. Back sleepers of average weight can choose Medium for contour plus zoned coil support. Choose Firm if you want less sink.

Stomach sleepers should pick Firm. Heavier stomach sleepers should confirm support with the brand, since weight guidance isn't published (checked September 2026). The bamboo cover and open AirGrown foam are positioned as airy, though some reviewers report sleeping warm. The thicker zoned coil unit with strengthened edges is positioned for heavier sleepers.

The US buy page lists Queen at $2,299, King at $2,599 and California King at $2,599. Other sizes, Twin and Twin XL prices, financing, discounts and sale timing aren't published (checked September 2026). The page shows dollars, but confirm USD at checkout.

The value comes from the customizable split-firmness system with free firmness swaps, a washable bamboo cover, a 100-night trial and a 10-year warranty. Per-size premiums and totals appear at checkout.

The cover is vortex-spun bamboo yarn, described as airy and smooth, detachable and washable. The comfort layers are high-density AirGrown polyurethane foam, described as buoyant with an open structure that passes air. The foam is Level A Global Green Tag Certified. The support core is twice-tempered steel pocketed zoned springs that move independently, with strengthened edges.

Layer thicknesses, foam densities and ILDs, coil counts and gauges, fire barrier and adhesive details aren't published. Neither are certifications beyond the Green Tag foam claim (checked September 2026).

Sag limits, indentation minimums and long-term test results aren't published as of September 2026. The 10-year warranty is the protection. Its terms are linked, but we didn't see the full text. Owner reports skew positive over years of use. A minority report a visible dip or sink within 1 to 3 years, and some say sag claims were hard to win.

Use a proper supportive base and a protector, and follow the brand's care guidance. Model-level longevity numbers aren't published.

ProductReview shows about 4.8 stars from about 5,767 reviews on the general Sleeping Duck mattress page. That sample leans toward Australia, and only one post in the excerpts named the Mach 2. Reviewers praise customizable comfort, back, neck and joint relief, partner-disturbance isolation, fast delivery and responsive support.

Complaints include sleeping warm for some and a very heavy build that needs two people to move. A minority report sag or sink with disputed warranty outcomes. US-specific ratings and BBB or complaint counts aren't published (checked September 2026). Verify current reviews before you buy.

You can buy direct online at sleepingduck.com. The US store is run by Sleeping Duck Inc, with a service team based in California. Reach it at +1 844.491.3825 or service@sleepingduck.com.

We found no showrooms or retail try-before-you-buy locations as of September 2026. Confirm the current US range and stock on the official buy page before you order.

Orders dispatch in 2 to 5 business days per the buy page. Delivery is free in major cities, and official excerpts say delivery to your door has no extra charge. The mattress arrives as a bed-in-a-box direct shipment.

US delivery zones, state timelines, room-of-choice service, setup scope, stairs handling and old-mattress removal aren't published (checked September 2026). Confirm tracking, delivery method and packaging at checkout.

You get a 100-night satisfaction guarantee with a full refund if you're not satisfied. The brand says it will pick up the return at no cost and donate the mattress to charity. Firmness swaps are offered for changing needs and couple splits.

The swap window, per-swap fees, swap limits and refund timing aren't published. Confirm the written US trial, exchange and refund terms before you buy.

The buy page states a 10 Year Warranty. The full text isn't published in the excerpts we saw. That covers defects, indentation minimums, exclusions such as stains, misuse and base needs, claim paperwork, and repair versus replacement. A warranty page link exists, but we couldn't see the terms.

Keep your receipt and follow the care and base needs. Confirm the claim steps with Sleeping Duck Inc before you buy (checked September 2026).

Against Australian bed-in-box rivals like Koala and Ecosa, Sleeping Duck stands out for per-side customizable firmness with swaps. The others offer one fixed feel. Against US bed-in-a-box hybrids, the split-firmness system and washable bamboo cover are the differences.

US rivals typically publish fuller spec sheets, firmer delivery networks and detailed warranty text. Detailed head-to-head specs, prices and policy comparisons aren't published (checked September 2026).

We read the brand's own product, policy and warranty pages, then checked retailer listings and public complaint sites like the Better Business Bureau. We last checked everything here in September 2026. Prices and policies change, so confirm them on the seller's page before you buy. You can read more in our methodology and editorial policy.