Tuft & Springs Affinity Ortho 1500 Gel Hybrid King Size Mattress
The Tuft & Springs Affinity Ortho 1500 Gel Hybrid pairs 1500 pocket springs with a layer of cooling gel memory foam, which means you get the contouring feel of foam without as much of the heat it can trap.
- Cool-touch foam for warm sleepers
- Minimises partner disturbance
- Medium-firm for back & front sleepers
£749
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Tuft & Springs Affinity Ortho 1500 Gel Hybrid Mattress
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Mattress details
Mattress
Tuft & Springs Affinity Ortho 1500 Gel Hybrid Mattress
Size
Firmness
Medium Firm
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Gel
Depth (cm)
29
Layers
3
Layer Details
Knitted Cover
A soft knitted cover that's breathable, which means heat can escape rather than build up around you. It helps keep your temperature even through the night.
Cooling Gel Fusion™ Memory Foam
Gel memory foam that feels cool to the touch and gently contours to your body. You get pressure relief at the shoulders and hips without the warmth traditional memory foam is known for.
1500 Pocket Springs
Each of the 1500 springs sits in its own fabric pocket and works independently of its neighbours. That means support adjusts to your shape and movement transfers less across the mattress.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- Proper room for two: You get 75cm each for two people sharing, which means 7.5cm more each than a UK double, usually enough to stop elbows and knees meeting in the night.
- Fewer wake-ups on different schedules: If one of you is up hours before the other, the independently pocketed springs keep the early riser's movement mostly on their own side of the UK king.
- Length for taller partners: At 200cm (6ft 6in), the UK king is 10cm longer than a UK double, so a partner over six foot can stretch out without their feet reaching the edge.
- Less trapped warmth with two sleepers: Two bodies produce more heat, and the gel memory foam is cool to the touch, which helps stop warmth building up where you both lie.
- Space without super king demands: We suggest at least 2.7m x 2.9m for the UK king, compared with at least 3m x 2.9m for the UK super king, so it fits more ordinary bedrooms.
This size suits you if...
You share the bed every night and keep drifting into each other's space on a UK double, one of you is over six foot and fed up with feet at the edge, or you keep different hours and want the early alarm to disturb the other a little less.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m once wardrobes are in. We'd recommend the UK double instead, which we suggest for rooms of at least 2.6m x 2.8m.
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FAQ's
Is the Affinity Ortho 1500 UK king big enough for two adults?
For most couples, yes. The UK king gives 75cm each for two people sharing, which is 7.5cm more each than the UK double. That extra width, combined with independently pocketed springs, means you can turn over without nudging your partner. If you also share with a dog most nights, the UK super king gives 90cm each.
Will I feel my partner moving on the Affinity Ortho 1500 in a UK king?
Less than on a narrower bed. Each of the 1500 springs sits in its own pocket and moves independently, so movement travels less across the mattress. On a UK king you also have 75cm each, giving a little more distance between you. It helps most when one of you gets up far earlier than the other.
Is the UK king long enough if you're over six foot?
The UK king measures 200cm, or 6ft 6in, which is 10cm longer than a UK double. For a partner over six foot, that length is often the real reason to upgrade, more than the width. The UK super king is the same length, so sizing up beyond the UK king adds width only.
Should I get the Affinity Ortho 1500 in a UK king or a UK super king?
Choose the UK king if your room is tighter: we suggest at least 2.7m x 2.9m, against at least 3m x 2.9m for the UK super king. The UK super king gives 15cm more each, which suits restless sleepers or anyone sharing with children or pets. Both are the same length.
Will a UK king Affinity Ortho 1500 fit in a new build master bedroom?
Measure after the wardrobes go in, as new build rooms often shrink once furniture is placed. We suggest at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m comfortable. At 29cm deep the mattress also sits tall on the frame, so it can feel larger in a compact room.