Harrison Spinks Emerald 16500 Pocket Mattress (Soft to Medium Feel)
Save with the previous model
Some retailers still sell the earlier version of this mattress. These is where it costs less than the current model's best price.
Mattress
Harrison Spinks Emerald 16500 Pocket Mattress (Soft to Medium Feel)
Size
Firmness
Medium Soft
Construction
Pocket Spring
Wool
Natural
Depth (cm)
29
Layers
5
Layer Details
Comfort fillings
Layers of natural British wool sit at the top, shaping around your body as you settle. Wool is naturally breathable, so it cushions without trapping heat.
Comfort fillings blend
Beneath the wool sits a blend of British wool, hemp and flax. This mix helps regulate temperature, which means you're less likely to be woken by warm nights or cold snaps.
Comfort fillings blend
A further blend of cotton, hemp and flax fibres adds soft, breathable padding. It keeps the comfort layers airy rather than dense.
Support system
700 Cortec™ Quad springs, encased in cloth pockets and secured in groups of four, form the core. They respond to your weight, shape and movement individually, so support adjusts to you rather than the person next to you.
Mini springs
15,800 mini springs deliver a slightly bouncy comfort layer with small pockets for airflow throughout the mattress. They add responsiveness where foam layers would simply compress.
Layer details from mattressonline.co.uk product page, September 2026.
- Proper space for two: At 75cm each for two people sharing, you can turn over or stretch out without a knee landing in your partner's back.
- Less disturbance on different schedules: The 700 Cortec™ Quad springs respond to each sleeper individually, so a 5am alarm on one side is less likely to wake the other.
- Length for taller sleepers: The UK king is 10cm longer than the UK double, which means feet stay on the mattress rather than hanging off the end.
- Softness without crowding: A soft to medium feel lets you settle in a little, and the wider surface means two settled sleepers still keep their own territory.
- Cooler sharing: Two bodies generate heat, and the wool, hemp and flax fillings breathe well, so a shared UK king stays more temperate through the night.
This size suits you if...
You share the bed every night and a double has started to feel like a compromise, especially if one of you gets up hours before the other and the movement carries. Or one of you is approaching six foot and wakes with feet over the edge. The 150 x 200cm footprint solves both, provided your room meets our suggested minimum of 2.7m x 2.9m.
Consider another size if...
Your bedroom is under our suggested 2.7m x 2.9m minimum, common in newer builds once wardrobes go in. We'd recommend the UK double instead, which is 15cm narrower and 10cm shorter, and needs at least 2.6m x 2.8m.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
Is the Emerald 16500 in a UK king big enough for a couple?
Comfortably, for most. You get 75cm each for two people sharing, and because this mattress has a soft to medium feel, that width helps you each settle into your own patch without rolling together. Across a whole night that gap between you is what keeps a restless partner from becoming your problem too.
What room size do I need for a UK king Emerald 16500?
We suggest at least 2.7m x 2.9m so you can walk around the bed and open drawers without shuffling sideways. That's our guidance rather than the manufacturer's. Measure with wardrobes and bedside tables in place, since a room that looks generous empty can feel tight once furniture arrives.
Is the UK king long enough for a tall sleeper on this mattress?
At 200cm long, the UK king Emerald 16500 is 10cm longer than the UK double, which is usually enough for anyone up to around six foot four. Given the softer feel lets your body sink in slightly, having that full length under your heels makes a real difference to how supported you feel.
Should we choose the Emerald 16500 in a UK king or a UK super king?
The UK king is 30cm narrower than the UK super king, and both are the same length, so this is purely a width and room question. If your bedroom can take at least 3m x 2.9m and you want maximum personal space, size up. If space is tighter, the UK king remains generous for two.
Will I feel my partner move on the Emerald 16500 UK king?
Less than on a traditional sprung mattress. The 700 Cortec™ Quad springs respond to weight and movement individually, and the width of the UK king adds physical distance on top. If one of you leaves for work hours before the other, that combination is what keeps the early alarm from ending both your nights.