Firmness
Type
Pocket Spring
Depth (cm)
23
Number of Layers
4
Trial Period (nights)
Warranty (years)
30
Price Range
£8,999 to £10,999
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Feather & Black, captured September 2026, and from regular price comparison across our UK retail partners.
You would choose the Hartley for its materials and construction rather than clever marketing. Two tiers of calico pocket springs give progressive support, which means gentle give at first contact and firmer resistance as you settle in. The all-natural filling blend breathes far better than synthetic foam, a genuine help if you sleep hot. An integrated insulator pad means it performs consistently on both slatted bedsteads and sprung bases, so you are less tied to a particular bed frame. Yes, £8,999 upwards is a serious outlay, but the retailer-listed 30-year guarantee is far longer than most brands offer, which spreads that cost over a very long ownership.
Key Features & what's inside
- Cover. An elegant damask cover with tailored handles and tape edging. The handles are a practical touch, as a mattress of this build is heavy to rotate.
- Natural fillings. Generous layers of natural fillings including British fleece wool, cotton, bamboo, cashmere, silk, alpaca and layered Shetland wool. Wool and silk regulate temperature naturally, which means fewer overheated nights than you would get from foam.
- Spring system. A double layer of Vispring pocket springs, individually nested in breathable cotton calico, 2,240 springs in all. Calico pockets allow air through and let each spring move independently, so you feel less of your partner's movement.
- Insulator pad. An integrated insulator pad ensures the Hartley performs consistently on both slatted bedsteads and sprung bases. In practice, that means less worry about whether your existing frame will suit it.
Layer details from featherandblack.com product page, September 2026.
Who's it NOT for?
At £8,999 to £10,999 this is out of reach for most budgets, and cheaper mattresses will still serve many sleepers well. The listed Firm tension may feel too solid for lightweight side sleepers, who often need more give at the shoulder and hip. There is also no Single size, and no trial period is stated.
Vispring Hartley Mattress
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How many springs does the Vispring Hartley have?
The Feather & Black listing states 2,240 pocket springs, arranged in a double layer. Each spring is individually nested in breathable cotton calico, which lets the springs respond to your body independently and helps air move through the mattress.
What is the Vispring Hartley made of?
The fillings are entirely natural: British fleece wool, cotton, bamboo, cashmere, silk, alpaca and Shetland wool, over a double layer of calico pocket springs. Natural fibres breathe well, which means better temperature regulation than synthetic foams, and the whole mattress is 23cm deep.
Does the Vispring Hartley come with a guarantee?
Feather & Black lists a 30-year guarantee, which is far longer than most brands offer. There is an asterisk noting exclusions apply, including mattresses used on a slatted base without a Vispring Mattress Pad, so check the terms before you buy.
Is the Vispring Hartley firm?
The tension listed at Feather & Black is Firm. That tends to suit heavier bodies and back or front sleepers, although lightweight side sleepers may find it a little too unyielding at the shoulders and hips.
What sizes does the Vispring Hartley come in?
It is available in UK Double, King and Super King, priced from £8,999 to £10,999. There is no Single option listed, so it will not suit anyone shopping for a smaller bed.
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