Firmness
Type
Pocket Spring
Depth (cm)
25
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
1
Price Range
£1,499 to £2,299
Best Sleeping Position(s)
Certifications
Assessed from Feather & Black's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
The Arlen makes sense if you want traditional craftsmanship with natural materials. The kapok in the comfort layer is naturally hypoallergenic, breathable and moisture-wicking, which means it should help regulate temperature if you tend to sleep warm. The 13,200 springs include micro pocket springs that react to the slightest movement, so you feel supported without that dead, unresponsive sensation cheaper mattresses can give. It is double-sided, so you can flip it to extend its life, something many modern mattresses no longer allow. Yes, the price is steep, but the natural fills, high spring count and flippable construction go some way to justifying it. The guarantee is short at 1 year.
Key Features & what's inside
- Surface. A soft damask fabric cover, machine stitched for longevity and traditionally tufted. Tufting holds the fillings in place, which means fewer lumps developing over the years.
- Comfort layer. A blend of natural wool, mohair, silk and kapok. Kapok is exceptionally durable, naturally hypoallergenic, highly breathable and moisture-wicking, which means a cooler, fresher feel through the night.
- Support layer. Platinum 3D polyester that is fully recyclable at the end of its life. A small but welcome nod to sustainability in a category that often ends up in landfill.
- Spring system. Individually wrapped pocket springs distribute body weight evenly for full-body support. Micro pocket springs react to the slightest movement, which means better contouring and less partner disturbance.
Layer details from featherandblack.com product page, September 2026.
Who's it NOT for?
If your budget is under £1,499, look elsewhere, as that's the starting price. Those wanting a distinctly firm or soft feel may find the medium tension a compromise. And if a long guarantee matters to you, the 1-year cover here is shorter than many brands offer.
Feather & Black Arlen Mattress
How firm is the Feather & Black Arlen mattress?
Feather & Black describe it as a medium tension offering adaptive support, ideal for front, back or side sleepers. In practice, medium suits most people, although lightweight side sleepers sometimes prefer something a little softer and heavier sleepers something firmer.
Can you flip the Feather & Black Arlen mattress?
Yes. The Arlen is double-sided and can be flipped, which helps the fillings settle evenly and extends the mattress's usable life. Many modern mattresses are one-sided, so this is a genuine point in its favour at this price.
Does the Feather & Black Arlen come with a trial?
Feather & Black offer a 100-night comfort promise. Be aware this is an exchange if you're not satisfied, not a full money-back refund, so it's slightly less generous than it might first appear.
How many springs does the Feather & Black Arlen have?
It has 13,200 springs, combining individually wrapped pocket springs with micro pocket springs. The pocket springs distribute your body weight evenly, while the micro springs respond to smaller movements for a more contoured feel.
What sizes is the Feather & Black Arlen available in?
It comes in UK Single, Small Double, Double, King and Super King, priced from £1,499 to £2,299. Delivery is free on all orders, with two man delivery to your room of choice, anticipated within 14 days of the product reaching the delivery depot.
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