Sealy Posturepedic Elevate Ultra Webber Memory Mattress
Mattress
Sealy Posturepedic Elevate Ultra Webber Memory Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
30
Layers
5
Layer Details
- Quilted comfort top. A plush quilted top with InfiniLux foam, which is where the medium to firm feel comes from. It's the surface softness you notice first, before the firmer support kicks in.
- Foam comfort layers. A stack of foam layers arranged softest at the top, getting firmer towards the centre. This graduated approach means you sink in gently rather than hitting firmness all at once.
- MemorySense Comfort Core. Positioned in the centre third of the mattress to give added support to your lower back and hips. It was developed with the International Orthopaedic Advisory Board, so there's genuine orthopaedic thinking behind the placement.
- AlignSupport Coil Springs. Sealy's Posturepedic coil spring system, designed to align your spine by sensing and responding to your body weight. In practice this means the mattress pushes back more where you're heaviest.
- BasePlank. A firm foundation layer that underpins the whole mattress. It works with the AlignSupport springs to stop the support layers from sagging into the base.
- Knitted cover with SmarTex technology. A knitted top cover using SmarTex technology. It sits over the quilted comfort top rather than being a comfort layer in its own right.
Layer details from mattressonline.co.uk product page, September 2026.
- A sensible shared size: At 135 x 190cm you get 67.5cm each for two people sharing, which works well for couples who sleep close rather than sprawled.
- Support for two different weights: The AlignSupport coil springs respond to body weight, which means a heavier and a lighter partner each get appropriate push-back on their own side.
- Fits most UK bedrooms: We suggest allowing at least 2.6m x 2.8m, which most double bedrooms manage with room for bedside tables on both sides.
- Central support where couples need it: The MemorySense Comfort Core sits in the centre third, reinforcing the lower back and hips, the area two sleepers load most.
- Easy to dress: Standard double sheets and a 200 x 200cm double duvet fit, and both are stocked everywhere at every price point.
This size suits you if...
You share the bed every night and want the traditional couples' size, or you sleep alone and like room to stretch out with a pet claiming a corner. It also makes sense if your bedroom needs to hold a wardrobe and drawers as well as the bed, and you'd rather keep floor space than maximise mattress width.
Consider another size if...
You and your partner both like space and your room measures comfortably beyond 2.7m x 2.9m. The UK king is 15cm wider and 10cm longer than the UK double, and we'd recommend it if taller sleepers share this bed.
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Is the UK double Sealy Elevate Ultra Webber big enough for two adults?
For most couples, yes. The UK double gives 67.5cm each for two people sharing, and the AlignSupport coil springs respond to each sleeper's weight, so partners of different builds get support on their own side. If either of you is tall or a restless sleeper, the extra width and length of the UK king is a real comfort gain.
What room size do I need for the Sealy Elevate Ultra Webber double?
We suggest allowing at least 2.6m x 2.8m for a UK double, with around 3m x 3m the comfortable norm. That leaves space to walk round the bed and fit bedside tables on both sides. If your room is a second bedroom sharing space with a wardrobe and drawers, measure the walking routes before you commit.
Is the double a good guest room choice for this mattress?
It's a strong one. The UK double comfortably sleeps visiting couples, and the medium firm feel suits back and front sleepers, which covers most guests. The centre-third MemorySense Comfort Core supports whoever ends up in the middle. Lighter side sleepers may find it slightly firm, but for occasional use that's rarely a dealbreaker.
Will a UK double mattress get up the stairs in an older house?
At 135cm wide, a UK double is easier to manoeuvre through turning stairs in older terraces and tight new build landings than a UK king. Sealy doesn't publish a boxed delivery size for this mattress, so check the retailer's delivery details on this page and measure your tightest turn before ordering.
Should I buy the UK double or size up to the UK king?
Choose the UK double if your room is close to our suggested 2.6m x 2.8m minimum, or if keeping floor space matters more than sleeping space. Size up if you can allow at least 2.7m x 2.9m for the UK king, which is 15cm wider and 10cm longer than the UK double. Compare the retailers listed on this page for both.