Harrison Spinks Coleridge Emperor Mattress

Pillow top
A cloud-like pillow top with built-in micro springs, which means a plush surface feel that keeps its shape rather than flattening the way a fibre-only topper can.

Natural fillings
Generous layers of 100% natural silk, cashmere, mohair, cotton, hemp, flax and British wool. Natural fibres breathe better than foam, so you're less likely to overheat.

Silk layer
Silk is the strongest natural fibre and is prized for moisture absorption and temperature regulation. In practice, that means a drier, more even sleeping temperature through the night.

Cashmere layer
Soft cashmere, taken as a byproduct from the fashion industry, known for its softness and insulation. It adds warmth in winter without trapping heat in summer.

British wool layer
Harrison Spinks has partnered with British Wool, so the wool is fully traceable from farm to factory. Wool also wicks moisture, helping regulate temperature.

Pocket springs
17,268 responsive springs across seven layers of high-density micro, Posturfil and Cortec™ pocket springs. Each spring moves independently, which means less partner disturbance and support that follows your body's contours.

Base layer
A chemical-free surface made from a wool and viscose blend. A reassuring detail if you'd rather avoid chemically treated materials next to your skin.

Layer details from featherandblack.com product page, September 2026.