Firmness
Firm
Type
Pocket Spring
Depth (cm)
31
Number of Layers
4
Trial Period (nights)
Warranty (years)
5
Price Range
£389 to £679
Best Sleeping Position(s)
Certifications
Assessed from the specification published by MattressNextDay, captured September 2026, and from regular price comparison across our UK retail partners.
Choose the Northington 2000 if you want traditional firm support with natural materials rather than foam. The British wool layer is 100% traceable and helps regulate temperature, which means it should sleep cooler than synthetic-topped rivals. Yes, firm mattresses can feel unforgiving at first, but the silk and cashmere layers add a softer surface feel over that supportive core. Certifications are reassuring for an anxious buyer: Good Housekeeping Institute 2018 recognition and an Allergy UK Seal of Approval. It's available in four UK sizes from Single to Super King, and MattressNextDay lists it with free next day delivery and a Rest Assured 5-year guarantee. If you're a hot sleeper on a mid-range budget, this deserves a look.
Key Features & what's inside
- Silk. A light, soft top comfort layer, which means the first thing you feel is gentle rather than the firm springs beneath. It adds a touch of luxury without changing the overall firm support.
- Cashmere. A rare filling that's softer and finer than wool, typically reserved for higher quality mattresses. It sits just under the silk to cushion the sleeping surface.
- Authentic Traceable British Wool. Wool from British Cheviot sheep, fully traceable from farm to shop, with a naturally strong yet soft fleece. It gives a natural bounce and helps regulate your temperature, so you're less likely to overheat.
- 2000 Pocket Springs. Each spring is sewn into its own fabric pocket, which means they work independently and contour to your body for better pressure relief. This also limits motion transfer, useful if you share the bed.
Layer details from mattressnextday.co.uk product page, September 2026.
Who's it NOT for?
This is a genuinely firm mattress, so lightweight sleepers and dedicated side sleepers may find it puts pressure on shoulders and hips. If you prefer the slow, cradling sink of memory foam, the springy natural feel here won't suit you. And with no trial nights stated on the listing, cautious buyers should check return terms before ordering.
Rest Assured Northington 2000 Pocket Natural Mattress
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How firm is the Rest Assured Northington 2000?
Retailer listings rate it Firm. That means solid, supportive push-back rather than sink-in softness, which tends to suit back and front sleepers and those who like a traditional supportive feel.
What is the Rest Assured Northington 2000 made of?
It combines 2,000 individual pocket springs with natural fillings: silk, cashmere and 100% traceable British wool, all under a Belgian damask cover. The wool comes from British Cheviot sheep and helps regulate temperature through the night.
Does the Northington 2000 come with a guarantee?
MattressNextDay lists it with a Rest Assured 5-year manufacturer's guarantee, and retailer feeds also show a 5-year guarantee. Terms can vary between retailers, so it's sensible to confirm at the point of purchase.
Is there a sleep trial with the Northington 2000?
The MattressNextDay listing doesn't state any trial nights for this mattress. If a trial period matters to you, check the returns policy of whichever retailer you buy from before ordering.
How deep is the Rest Assured Northington 2000 mattress?
It's 30.5cm deep, which is a generous depth. Deeper mattresses can be trickier with fitted sheets, so check your bedding will accommodate it, particularly if you're using standard-depth sheets.
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