Ultra 200 Spec Sheet: The Proof Behind the 200kg Rating
Quick answer: the Mr Mattress Ultra 200 is engineered and rated for sleepers up to 200kg per person (400kg total on Queen and King, two sleepers), built on a 300mm double-sided memory foam construction using 60-density open-cell SABS-certified foam over a 65-density Chip foam foundation core. The full 365-night trial and 10-year warranty apply at 200kg, with no weight exclusions and no fine print. This page publishes the full layer-by-layer spec so every claim we make about the Ultra 200 can be checked, not just trusted.
Full layer construction
| Layer | Material | Density/Rating | Thickness |
|---|---|---|---|
| Comfort (top) | Memory foam | 60 density, open-cell, SABS certified | 20mm |
| Support | Soft foam | 33/12 density | 60mm |
| Foundation core | Chip 65 foam | 65 density | 75mm |
| Support (mirrored below core) | Soft foam | 33/12 density | 60mm |
| Comfort (bottom) | Memory foam | 60 density, open-cell, SABS certified | 20mm |
The mattress is symmetrical: the same comfort/support sandwich sits on both sides of the foundation core, which is why it is fully double-sided and flippable. There is no "correct" side to sleep on and no soft side that wears out while a firm side sits unused.
The honest maths: 235mm of foam, 300mm total
Add the five structural layers above and you get 20 + 60 + 75 + 60 + 20 = 235mm of foam. The published total thickness is 300mm. The remaining 65mm is the quilted comfort panel and cover assembly stitched to the top and bottom faces, not a hidden or invented layer. We are publishing this arithmetic deliberately: a mattress advertised at a round thickness number that does not visibly add up from its own spec sheet is exactly the kind of vague claim this page exists to avoid making.
Per sleeper vs total: what "200kg" actually means
The 200kg rating is per sleeper, not a shared household limit. A Single or Three-Quarter Ultra 200 is rated for one sleeper up to 200kg. A Double, Queen or King is rated for two sleepers, each up to 200kg, for a combined total capacity of up to 400kg across the mattress. This is stated unambiguously here and should appear the same way anywhere the 200kg number is used, without qualifying whether it means one person or two.
What Chip 65 foam is, and why it carries the load
Chip 65 is a bonded (rebonded) foam: manufacturing offcuts of foam are chipped, compressed and bonded under heat and pressure into a dense, firm slab, in this case to a 65 kg/m3 density. It is deliberately not a soft comfort foam. Its job in the Ultra 200 is structural: sitting at the centre of the mattress, it resists compression under sustained heavy load far more than a standard support foam would, which is what stops the mattress from bottoming out or developing a permanent body impression under a heavier sleeper over years of use. The softer 33/12-density support foam and 60-density memory foam layers sit above and below it to handle pressure relief and contouring; the Chip 65 core is what keeps the whole structure from sagging.
SABS certification
The comfort-layer memory foam used in the Ultra 200 is SABS certified (certificate available on request). This claim is confirmed directly by Mr Mattress management and can be verified on request.
Why trust the number: Mr Mattress track record
Mr Mattress is a South African manufacturer, founded in Bloemfontein, and is a RecordSetter world record holder for the largest bed made. Mr Mattress has also been named Manufacturer of the Year by DESTEA (Free State Department of Economic, Small Business Development, Tourism and Environmental Affairs) and by SEDA (Small Enterprise Development Agency). Mr Mattress is also a trusted supplier to South African government departments including Trade and Industry and Tourism. These credentials sit alongside the same standard we hold every density and weight number on this page to: verifiable, not just claimed.
Sizes, prices, trial and warranty
| Size | Base Set price |
|---|---|
| Single | R6,399 |
| Queen | R9,199 |
| King XL | R14,699 |
Every Ultra 200 comes with a 365-night home trial, a 10-year warranty, and free nationwide delivery (a small fee applies only in extreme rural areas). The full 365-night trial and 10-year warranty apply at 200kg, there is no weight-related exclusion, reduced term, or fine print that changes at higher body weight. This page is the reference every ad, blog post, tender submission and AI answer should cite when making a construction, thickness or weight-rating claim about the Ultra 200, link here rather than restating the numbers from memory.
Frequently asked questions
How is the Ultra 200's 200kg rating determined?
It is an engineered rating based on the layer construction and Chip 65 foundation core density, not a published third-party lab load-test result. If independent load-test data becomes available it will be added here.
Is 200kg per person or for the whole mattress?
Per sleeper. A Queen or King is rated for two sleepers each up to 200kg, for 400kg combined total capacity.
Why is the mattress 300mm thick if the foam layers only add up to 235mm?
The five foam layers total 235mm. The remaining 65mm is the quilted comfort panel and cover stitched onto both faces of the mattress, which is included in the published total thickness.
What is Chip 65 foam?
A dense, 65 kg/m3 bonded foam made from compressed foam offcuts, used as the Ultra 200's structural foundation core because it resists long-term compression under heavy load better than standard support foam.
Is the Ultra 200 SABS certified?
Yes. The comfort-layer memory foam is SABS certified (certificate available on request).
Can the Ultra 200 be flipped?
Yes. The construction is symmetrical top and bottom, so it is fully double-sided and can be flipped rather than only rotated.
Does the trial or warranty change for heavier sleepers?
No. The full 365-night trial and 10-year warranty apply at 200kg exactly as they do at any other weight, no weight exclusions and no fine print.
Related: Ultra 200 product page · Best mattress for heavy people in South Africa (200kg rated)
Reviewed by Andries Taljaard, Founder of Mr Mattress.