Firmness
Firm
Type
Pocket Spring
Depth (cm)
29
Number of Layers
5
Trial Period (nights)
100
Warranty (years)
10
Price Range
£499 to £929
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
Choose the Isabelle 2000 if you want a traditional firm pocket spring mattress from a National Bed Federation approved brand, without a memory foam feel. The individually cased springs adapt to movement independently, which means less disturbance when a partner shifts, and the mini pocket spring layer adds pressure relief that a plain firm mattress can lack. Wool and fibre fillings encourage airflow, useful if you tend to sleep warm. Buying through Mattress Online, the sole listed retailer, gets you their 100-night trial and free delivery to most locations, and the page states a 10-year guarantee. The from-price of £499 is fair for a handcrafted, 2,000-spring British mattress.
Key Features & what's inside
- Damask cover. A damask cover, which is a finely woven and durable fabric, forms the sleep surface. It is soft to the touch.
- Wool. A layer of natural wool sits beneath the cover for cosy, cushioned comfort. Wool also helps regulate temperature naturally.
- Soft White Fibres. Soft white fibres increase airflow through the mattress. This works alongside the wool to keep the sleeping temperature steadier.
- Mini Pocket Springs. Small, individually cased springs sit above the main spring unit. They add a gentle, contouring layer of pressure relief before you reach the firmer support below.
- Pocket Springs. The main support comes from 2,000 individual springs encased in cloth pockets. Each spring moves independently, which means support is distributed to each part of your body and a restless partner is less likely to wake you.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
This is a firm mattress, so lightweight side sleepers may find it presses on hips and shoulders rather than letting them sink in. One owner review also mentions the springs feeling weak at the edges, so if you sit on the side of the bed often, it may not be the best fit.
Relyon Isabelle 2000 Pocket Mattress
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Is the Relyon Isabelle 2000 mattress firm or soft?
It is rated firm. Sprung with 2,000 pocket springs plus a mini pocket spring layer, it gives solid support with some surface contouring. One owner review does describe the edges as feeling weaker than the firm rating suggests, so the firmness may feel less consistent right at the sides.
Does the Relyon Isabelle 2000 come with a trial period?
Mattress Online, the retailer listing it, offers a 100-night trial. That trial is the retailer's own policy rather than a Relyon guarantee, so if you buy elsewhere the terms may differ.
How long is the guarantee on the Relyon Isabelle 2000?
The Mattress Online listing states a 10-year guarantee, which is a generous span and reflects the handcrafted UK build. As it appears on a retailer's page, it's sensible to confirm the guarantee terms with them at the point of purchase.
What sizes does the Relyon Isabelle 2000 come in?
Five UK sizes are available: single, small double, double, king and super king. Prices range from £499 to £929 depending on the size you choose.
Is the Relyon Isabelle 2000 good for hot sleepers?
It should cope reasonably well. The wool layer regulates temperature naturally and the soft white fibres increase airflow through the mattress, while the open spring construction avoids the heat retention some foam mattresses suffer from.
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