Rank #10 in Best Double Mattress 2026: 10 Ranked, and Where the Spec Sheets Disagree
Simba Simbatex Cool All-Foam Mattress, Double, 23cm
Price and rating as shown on Amazon when we collected them. Both change.
The Simba Simbatex Cool is the mattress at number ten in this guide. It is an all-foam double measuring 135 × 190 cm and 23 cm deep, with four layers, a seven-zone support base and a medium firm feel, topped by a graphite-infused Simbatex foam that Simba says produced over five times more airflow than standard memory foam in independent lab tests. At £319.20 it costs more than double the two £149.99 mattresses named elsewhere in this guide.
Simba's own numbers do not argue with each other the way some listings here do: the size name, the item dimensions and the thickness field all read 135 × 190 × 23 cm, and the "four layered" note in the special features matches the layer count of 4.0. The odd figure is the weight. Simba lists this double at 21 kg — lighter than the 23.9 kg to 28.5 kg range the guide's other 25 cm mattresses sit in, though the Happiland, also 25 cm, is listed at 10.9 kg, so thickness is no guide to weight. One reviewer below nonetheless calls it "extremely heavy". The ratings are split rather than bunched, with 68% at five stars and 12% at one. Everything on this page is taken from the Amazon listing and its customer reviews; we have not tested the mattress.
How those 44 ratings break down
An average hides its own shape. This is the spread behind the 4.2 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £319.20 |
|---|---|
| Customer rating | 4.2 out of 5 from 44 ratings |
| Rating spread | 68% five-star, 14% four-star, 6% three-star, 12% one-star |
| Construction | All-foam, four layers, medium firm feel, seven-zone support base |
| Dimensions | 190 x 135 x 23 cm — the size name, the item dimensions and the thickness fields all agree |
| Weight | 21 kg |
| Cover | Knitted polyester with a zip-off top that is machine washable |
| Delivery | Arrives rolled and vacuum-packed in plastic, not boxed; allow 24–72 hours to expand |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“Delivered in a roll and vacuum packed in heavy duty plastic bag. Straight out the bag, this started to grow and expand. Left it for over 48 hours, as stated, and am delighted with the comfort and quality.It's extremely heavy and this translates into a comfortable firm mattress. Great nights sleep.Didn't notice any bad smell, which can sometimes happen with this type of product.I particularly like that this has a full-zip top cover, which is easy to remove and throw into your washing machine, for freshness.I have only spent 2 nights on it but so far, I'm impressed. The memory foam kept its shape. I think it will be durable and last for quite some time.Very pleased with the price. It was on special offer (around 25% discount) so, for an extremely well regarded brand, I was delighted.”
Verified purchase“Its been 2 days of sleep on this. No complaints at all. Should be good enough for lightweight sleepers, No need for pocket spring non sense as it use to cause back aches.”
What it is up against
The rivals it was ranked against in Best Double Mattress 2026: 10 Ranked, and Where the Spec Sheets Disagree.
Questions people ask
What size is the Simba Simbatex Cool?
The listing names it as a Double, 4ft6, measuring 135 × 190 cm and 23 cm thick, and the size, item dimensions and thickness fields all give the same 135 × 190 × 23 cm.
How much does the Simba Simbatex Cool weigh?
Simba lists this double at 21 kg, though one customer review calls it "extremely heavy". For comparison, the 25 cm mattresses elsewhere in this guide are listed between 23.9 kg and 28.5 kg.
Does the Simba Simbatex Cool need flipping?
No. The care instructions say to rotate it 180° every one to three months and state that there is no need to flip it.
Is the Simba Simbatex Cool cover machine washable?
Yes. The cover is knitted polyester and has a zip-off top that can be machine washed.
How long does the Simba Simbatex Cool take to expand?
Simba says to allow 24 to 72 hours for full expansion after unrolling, and to air the mattress to reduce foam odour.
Where is the Simba Simbatex Cool made?
In Lancashire, according to the listing, by specialist manufacturers using CertiPur-approved foams. It arrives folded in compact plastic packaging rather than boxed.
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