Salus Sequoia 12000 Pocket Hybrid Box Top Mattress
The Salus Sequoia 12000 Pocket Hybrid Box Top Mattress combines 12,000 pocket springs with a Gelflex memory foam layer, which means a cushioned, medium-soft feel that eases pressure while shedding heat.
- Plush medium-soft feel for side sleepers
- Cooling particles help disperse heat
- Foam border for supportive edges
£2,115
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This premium hybrid has a box top layer over Gelflex memory foam, reflex foam and 12,000 springs, made up of 1,000 pocket springs and 11,000 mini pocket springs. It's rated medium soft, so it feels plush and cushioned rather than firm. It comes in UK Double, King and Super King. Mattress Online offers a 100-night trial, and the mattress has a 10-year guarantee.
Mattress specifications
Firmness
Medium Soft
Type
Hybrid
Depth (cm)
Number of Layers
Trial Period (nights)
Warranty (years)
Price Range
£2,115 to £2,615
Best Sleeping Position(s)
Side Sleeping
Certifications
Why should you choose this mattress?
The quilted cover and box top layer create a cosy, cushioned surface, so you sink in a little rather than lie on top. The Gelflex memory foam shapes around your body to lift weight off pressure points, and its cooling particles are designed to disperse heat and moisture. Below that, 1,000 pocket springs and 11,000 mini springs add support and bounce, while a high-density foam border steadies the edge. It suits most side sleepers and lighter to average builds, although anyone wanting a firm feel may find it too soft.
Key features & layer details
Micro-quilted cover
A micro-quilted cover stitched into the filling beneath it. It gives a smooth, soft finish and a plush quilted feel.
Box top layer
A box top layer that creates a cosy, cushioned sleep space. It adds to the softer feel on the surface.
Gelflex memory foam
A memory foam layer shaped around body contours, with small cooling particles that behave like a gel. It lifts weight off pressure points and helps disperse heat and moisture.
Reflex foam
A soft, flexible reflex foam layer. It adds support to help keep your spine well aligned.
Pocket springs
1,000 traditional pocket springs in cloth pockets that adapt to movement. Each part of your body gets its own support.
Mini pocket springs
11,000 mini pocket springs that add bounce and a cuddly feel. They also promote airflow through the mattress.
High-density foam border
High-density foam placed around the edge of the spring unit. It makes the edge more stable and helps it last.
Layer details from mattressonline.co.uk product page, October 2026.
Best suited for?
Side sleepers
The medium soft feel and Gelflex memory foam shape around your body, which means shoulders and hips sink in a little and feel cushioned.
Lighter sleepers
A medium soft rating with a cushioned box top layer means lighter to average builds can sink in and feel the plush surface properly.
Warm sleepers
Cooling particles in the Gelflex memory foam help disperse heat and moisture, while the 11,000 mini pocket springs promote airflow through the mattress.
Couples
Pocket springs in cloth pockets adapt to movement, so each part of your body gets its own support, and the Super King size gives plenty of room.
If you prefer sleeping on a firm mattress, this might not be the best choice. It's rated medium soft and the box top adds extra cushioning, so heavier sleepers or anyone who needs a flat, unyielding surface may find it gives too much. At 42cm deep, you'll also need fitted sheets that are deep enough.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Salus Sequoia 12000 Pocket Hybrid Box Top Mattress
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FAQ's
How firm is the Salus Sequoia 12000 Pocket Hybrid Box Top?
It's rated medium soft, and the retailer's page describes it as soft to medium. The box top layer adds a cushioned feel, so it suits sleepers who like some give, but it may feel too soft if you want firm support.
What sizes does the Salus Sequoia 12000 Pocket Hybrid Box Top come in?
It's available in UK Double, UK King and UK Super King. There's no single size listed, so if you're buying for one sleeper in a smaller bed, you'll need to look at another model.
How deep is the Salus Sequoia 12000 Pocket Hybrid Box Top?
It's 42cm deep, which is a fairly tall mattress. Check that your bed frame and fitted sheets can cope with that depth before you order.
How many springs does the Salus Sequoia 12000 Pocket Hybrid Box Top have?
It has 12,000 springs in total: 1,000 traditional pocket springs in cloth pockets, plus 11,000 mini pocket springs. The larger springs give targeted support, while the mini springs add bounce and help air move through the mattress.
Does the Salus Sequoia 12000 Pocket Hybrid Box Top come with a trial or guarantee?
Mattress Online offers a 100-night trial, and you need to buy a mattress protector from them to be eligible. The mattress itself comes with a 10-year guarantee.
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