Who the LuxeErgo 3400 suits
The LuxeErgo 3400 is the best mattress in the Luxe range and the one we would choose ourselves. It is the only mattress on this site scoring 9.0 for both support and comfort, and that combination is the hard problem in mattress design: firm enough to hold your spine in line, comfortable enough that you do not resent it.
It suits back and front sleepers, people with back pain, heavier sleepers, and couples who need one mattress to work for two different bodies. It is the answer for anyone who has tried an orthopaedic foam mattress like the OrthoSupport9, appreciated the support and disliked the surface. Lighter dedicated side sleepers should still go softer – the Luxe Nova Hybrid is built for them.
Construction and materials
Thirty-one centimetres, the deepest mattress in the range. Dual-layer pocket springs sit under a high-density support foam layer, with a natural wool and cotton cover on top. The dual-spring arrangement is the engineering that earns the scores: a larger, firmer spring layer provides the structural support, while a smaller, more responsive layer above it handles contouring. One unit cannot do both jobs well, which is why single-spring hybrids always compromise somewhere.
The seven-zone configuration firms the springs under the hips and lumbar region and softens them under the shoulders and legs, so the mattress is doing different things along its length rather than presenting one uniform surface. The natural wool and cotton cover regulates moisture and temperature the way synthetic covers cannot.
Comfort and support
Nine out of ten for support and nine out of ten for comfort. The dual-spring system is why. On your back, the firm lower spring layer holds the pelvis level while the responsive upper layer and support foam fill the lumbar curve. On your front, the hips are held up and the lower back stays neutral. On your side, the softened shoulder zone gives enough to keep the spine level for anyone of average build or heavier.
The firmness rating is genuinely firm, but the seven-zone contouring means it does not feel hard, which is the distinction people struggle to articulate when they say they want "supportive but comfortable". See our orthopaedic guide for how zoning changes the equation.
Temperature
Very good. The dual-spring layers create substantial open volume for air to move through, and the natural wool and cotton cover absorbs and releases moisture through the night. Wool in particular is a genuinely effective temperature regulator, warm when cool and cool when warm. Only the dedicated cooling mattresses beat it.
Edge support and motion isolation
Edge support is excellent – deep dual-layer springs hold the perimeter firmly, so the whole surface is usable and sitting on the side does not sink. That matters most on a double or king shared by two adults. Motion isolation is good rather than exceptional: pocketed springs limit transfer well, but an all-foam mattress will always be quieter.
Durability, trial and warranty
Dual-layer pocket springs at 31cm represent a lot of durable material, and spring units outlast comfort foams by a wide margin. Expect 10 or more years of nightly use, the longest we would predict for anything on this site. The 100-night trial and 10-year warranty apply – the trial is the one area where Emma's 200 nights is the better offer at this price. Rotate head-to-toe quarterly.
Our verdict
Our highest recommendation in the Luxe range. Matching 9.0 scores for support and comfort is not something we award lightly, and the dual-spring, seven-zone construction is genuinely better engineering than anything else here. At its regular sale price of around £464 it undercuts the Emma Original Pro while beating it on depth, zoning and comfort. The only reservations are the shorter trial period and the fact that lighter side sleepers should buy something softer. For everyone else, this is the best mattress on this site.
