Firmness
Type
Pocket Spring
Depth (cm)
25
Number of Layers
3
Trial Period (nights)
Warranty (years)
1
Price Range
£169 to £359
Best Sleeping Position(s)
Certifications
Assessed from Spring King's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Choose the Madrid 1000 if you want honest pocket spring support at a low price. The independent springs adjust to your shape and reduce the roll-together you get with cheaper open coil designs, which means less disturbance if you share the bed. It's National Bed Federation approved, hypoallergenic and meets the BS7177: 2008 fire safety standard for domestic use, reassuring credentials at this price point. Six sizes are available, from UK Small Single up to UK Super King, and delivery is free next day to mainland UK, although some addresses may incur a small fee. Yes, the fillings are simple polyester fibre rather than anything plush, but that keeps the cost between £169 and £359.
Key Features & what's inside
- Cover. A breathable Belgian damask fabric cover, which means air can move through the sleep surface rather than trapping warmth against you. It's a traditional, hard-wearing choice.
- Comfort Fillings. Soft white fibre fillings made from 100% polyester. These give a gentle cushioned feel over the springs, though they're simpler than the foam layers found on pricier mattresses.
- Support System. 1,000 individually pocketed springs, each mounted in its own separate fabric pocket so they work completely independently of one another. In practice, that means support follows your body's contours and your partner's movements are less noticeable.
Layer details from mattressnextday.co.uk product page, September 2026.
Who's it NOT for?
If you love a deep, cradling feel, the slim polyester fillings here won't give you that, and side sleepers with sensitive hips may want something softer than medium firm. It's also less suited to anyone wanting a long guarantee, as Spring King offers one year on this model.
Spring King Madrid 1000 Pocket Mattress
Across 273 reviews on the Spring King product page at mattressnextday.co.uk, the mattress holds a 4.7 rating, with owners frequently highlighting comfort, support and noticeable improvements in sleep quality.
View all mattresses
How firm is the Spring King Madrid 1000 mattress?
Spring King describes it as medium firm. That suits most back and front sleepers, although lightweight side sleepers may find it a little too firm through the shoulders and hips.
How many springs does the Madrid 1000 have?
It contains 1,000 individually pocketed springs, each in its own separate fabric pocket. They work independently of one another, so support adapts to your shape and movement transfers less across the bed.
How deep is the Spring King Madrid 1000?
It's 25cm deep, which is a reasonable depth for a pocket spring mattress at this price and should fit standard fitted sheets comfortably.
What guarantee comes with the Spring King Madrid 1000?
It comes with a 1 year guarantee, which is shorter than many brands offer. The mattress is National Bed Federation approved, which gives some added reassurance about how it's made.
Is the Spring King Madrid 1000 good for allergy sufferers?
It's listed as hypoallergenic, and the fillings are 100% polyester fibre rather than natural materials, which some allergy sufferers prefer. It also meets the BS7177: 2008 fire safety standard for domestic use.
Couldn't find an answer to your question? Send us a message