Why our sleep experts loved it
The Dormeo Octasmart Premium Hybrid Deluxe Mattress made a better case for itself in the showroom than the spec sheet did. Dormeo throws a lot of terminology at this range, and some of it still sounds a bit inflated, but the actual feel was convincing. The surface had enough cushioning, the support changed clearly across the bed, and the construction did not feel like a gimmick once I was lying on it.
I would still buy it on promotion. In a double, my ceiling would be below £700. Past that point, I would be testing the Simba Hybrid and Emma NextGen Premium on the same afternoon, because both sit in the same conversation for buyers wanting a boxed hybrid with a modern foam feel.
Construction and everyday practicality
The useful specification starts with the 40mm memory foam layer. That is enough foam on top to give proper pressure relief, and in store it did not feel like a token comfort pad. Under that sit the honeycomb Octasprings in 5 smart body zones, then individually wrapped pocket springs adding the steadier push-back. The result felt coherent. Some multi-layer hybrids feel as though each layer is arguing with the next; this one came together better.
Aerocell foam, Ecocell and Fusion foam are all part of the support and comfort stack. I am less interested in the names than the behaviour, and the behaviour was sensible: light contouring at the top, no obvious sag at the hip, and a base that felt more stable than a pure foam Dormeo. The smart performance hypoallergenic cover also has comfort pockets, plus anti-bacterial and antimicrobial treatment. Nice to have, though I would still use a protector from day one.
The 24cm height is a practical win. It should work with normal bed frames and should not make fitted sheets a wrestling match. It is also a no-turn mattress, so rotation is the job. Softer hybrids can develop favourite spots if ignored, so I would be strict with regular rotating during the early months.
Dormeo says the Octavent air system makes it 8 times more breathable than standard memory foam and can cool the bed by up to 3°C. The showroom model did feel airier than dense memory foam I have tested from Nectar, but showroom air and a full summer night are completely different tests. I would treat the cooling claim as promising, not proven.
Feel and support on the shop floor
The comfort choice is Medium to Soft, and the label is accurate. The first contact is cushioned, with a slow memory-foam softness, then the Octaspring section gives a more responsive feel underneath. I did not get that stuck-in-foam sensation. Good sign.
The zoned response was easy to feel by hand and under body weight. Around the shoulder, the mattress gave more readily. Through the centre, it held the hips with more authority. That definition impressed me, although I would want several nights before deciding whether the zoning keeps the spine happy after the initial novelty has worn off.
Compared with the Simba Hybrid, this Dormeo felt plusher at the top and a little more sculpted through the body zones. Simba has a tidier, tauter feel. The Dormeo is the one I would steer towards a side sleeper wanting extra sinkage, provided they are comfortable with a softer mattress overall.
Movement across the surface was controlled during in-store testing. Shifting from side to back did not send a big ripple through the mattress, and the pocket springs seemed to be doing their job. Partner disturbance still needs a proper overnight test, particularly with two different body weights on the bed.
Who should try it first
Side sleepers are the clearest match. The shoulder area has enough give to reduce pressure, and the hip section felt supportive without feeling hard. Lighter people should also get the benefit of the comfort layers, because the mattress does not need much weight before it starts responding.
Hourglass figures could find the shape of the support useful. There is enough sink for the shoulder and hip to settle into the surface, with the centre section resisting a full collapse. Front sleepers need caution here. A Medium to Soft feel can let the pelvis sit too low, and heavier front sleepers should be looking at a firmer Dormeo, Hypnos or Sealy option before committing.
Verdict from the showroom
This is a solid Dormeo, and I like the direction the brand is taking with these hybrid builds. The 5-year guarantee is acceptable, not generous, and rolled-in-a-box delivery is useful for awkward stairs. My decision would come down to the sale price: below £700 in a double, I would put it high on the shortlist for side sleepers who want cushioning without losing the zoned support feel.
Why you can trust WantMattress
We spend hours testing (and/or researching) every product or service we review, so you can be sure you’re buying the best. Find out more about
how we test .
