# What are the thickest memory foam mattresses on the market? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are the thickest memory foam mattresses on the market?

## Products

### WinkBeds GravityLux Memory Foam
```yaml
product: winkbeds-gravitylux-memory-foam
brand: WinkBeds
price_gbp: 1344.22
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
layers: 4
density: null
firmness: Soft 4 / Medium 6 / Firm 8
thickness: 10 in
motion_isolation: Excellent
temperature_regulation: Tencel cover, gel-infused and AirCell open-cell foams for cooling
```

- **Price:** £1344.22 [^1]
- **Summary:** The GravityLux is an 10 in all-foam mattress with responsive AirCell memory foam, zoned progression foam, and a high-density Atlas core for support. It offers strong pressure relief, low motion transfer, and temperature-regulating features, suited to side, back, and combo sleepers and couples.
- **Additional Sources:** [^2], [^3]

### Glacier Glacier Apex
```yaml
product: glacier-glacier-apex
brand: Glacier
price_gbp: 783.82
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
layers: 7
density: null
firmness: 6 out of 10
thickness: 14 in
motion_isolation: Very low motion transfer (34% less than average)
temperature_regulation: Copper and graphite-infused foams, gel-infused memory foam, ventilated ARCFlow foam, upgraded cooling cover
```

- **Price:** £783.82 [^4]
- **Summary:** The Glacier Apex is a 14 in hybrid mattress with multiple cooling technologies (copper, graphite, gel foams, ventilated foam) and a pocketed coil base for airflow and support. It offers medium-firm feel and is designed for sleepers who want strong cooling, pressure relief, and low motion transfer.
- **Additional Sources:** [^5], [^6]

### Puffy Puffy Cloud
```yaml
product: puffy-puffy-cloud
brand: Puffy
price_gbp: 783.82
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
layers: 3
density: null
firmness: Medium (5-7/10)
thickness: 10 in
motion_isolation: High
temperature_regulation: Good (cooling foam layers)
```

- **Price:** £783.82 [^7]
- **Summary:** The Puffy Cloud is a 10 in all-foam mattress with responsive memory foam comfort layers over a firm support core, aimed at back and side sleepers who want pressure relief and strong motion isolation. It suits couples and lighter-to-average-weight sleepers seeking a medium feel with cooling foam for better temperature regulation.
- **Additional Sources:** [^8], [^9]

### Brooklyn Bedding CopperFlex Pro Memory Foam
```yaml
product: brooklyn-bedding-copperflex-pro-memory-foam
brand: Brooklyn Bedding
price_gbp: 410.21
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
layers: 6
density: null
firmness: Medium Firm (6)
thickness: 14 in
motion_isolation: High (9.5/10)
temperature_regulation: GlacioTex cover and copper-infused foam; mixed (7/10)
```

- **Price:** £410.21 [^10]
- **Summary:** A 14 in memory-foam-focused mattress with copper-infused memory foam, zoned transitional layers, and a GlacioTex cooling cover. It suits side sleepers (especially 130-230 lbs), couples who need motion isolation, and people who want strong pressure relief.
- **Additional Sources:** [^11], [^12]

### Saatva Saatva Contour5
```yaml
product: saatva-saatva-contour5
brand: Saatva
price_gbp: 1998.02
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
layers: 7
density: null
firmness: Medium (5-7/10) or Firm (8/10)
thickness: 12.25 in
motion_isolation: Excellent
temperature_regulation: Adaptive cooling with CoolVent™ system and phase change material
```

- **Price:** £1998.02 [^13]
- **Summary:** The Saatva Contour5 is a 12.25 in all-foam memory foam mattress with seven layers including a phase change material lumbar zone, gel-infused memory foam, and a high-density support base. It comes in Medium or Firm options and targets sleepers who want strong body contouring, pressure relief, and cooling features while prioritizing motion isolation.
- **Additional Sources:** [^14], [^15]

### DreamCloud DreamCloud Luxe Memory Foam
```yaml
product: dreamcloud-dreamcloud-luxe-memory-foam
brand: DreamCloud
price_gbp: 1120.06
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
layers: 5
density: null
firmness: Medium
thickness: 14 in
motion_isolation: High
temperature_regulation: Phase change material and cooling fibers
```

- **Price:** £1120.06 [^16]
- **Summary:** The DreamCloud Luxe Memory Foam is an all-foam, euro-top mattress with contouring memory foam and cooling materials designed for pressure relief and reduced motion transfer. It suits side and back sleepers who want a plush, contouring feel with good motion isolation and built-in cooling features.
- **Additional Sources:** [^17], [^18]

### Nectar Nectar Ultra (Premier) Memory Foam
```yaml
product: nectar-nectar-ultra-premier-memory-foam
brand: Nectar
price_gbp: 1268.75
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
layers: 2 (7.0 in comfort layer; 8.0 in support layer)
density: null
firmness: 5 out of 10
thickness: 15 in
motion_isolation: Exceptional / very low motion transfer
temperature_regulation: Outstanding cooling performance
```

- **Price:** £1268.75 [^19]
- **Summary:** The Nectar Ultra is a 15 in all-foam mattress with a very thick comfort layer for strong pressure relief and zoned support; it sleeps cooler than typical memory foam and isolates motion well, making it suited for side sleepers, couples, and those who want strong contouring. Best for sleepers who prioritize pressure relief and cooling with a medium feel.
- **Additional Sources:** [^20]

---
## References & Sources
[^1]: WinkBeds (official), accessed 2026-06-07. https://www.winkbeds.com/pages/shop-gravitylux
[^2]: Mattress Clarity, accessed 2026-06-07. https://www.mattressclarity.com/reviews/winkbeds-memorylux-mattress-review/
[^3]: Mattress Nerd, accessed 2026-06-07. https://www.mattressnerd.com/winkbeds-gravitylux-mattress-review/
[^4]: Glacier, accessed 2026-06-07. https://glaciersleep.com/products/glacier-apex
[^5]: Tom's Guide (deal noting Glacier price), accessed 2026-06-07. https://www.tomsguide.com/mattresses/glacier-apex-hybrid-hands-on-review
[^6]: Steinhafels, accessed 2026-06-07. https://www.steinhafels.com/product/group/mattresses/mattress-size/twin/biam/glacier-apex-medium-plush-twin-mattress/2998393/2998081
[^7]: NapLab, accessed 2026-06-07. https://naplab.com/mattress-reviews/puffy-cloud-review/
[^8]: Mattress Clarity, accessed 2026-06-07. https://www.mattressclarity.com/reviews/puffy/
[^9]: StL Back Store, accessed 2026-06-07. https://stlbackstore.com/product/puffy-cloud-mattress-by-puffy/
[^10]: Brooklyn Bedding, accessed 2026-06-07. https://brooklynbedding.com/products/copperflex-pro-hybrid-14
[^11]: The Mattress Shop, accessed 2026-06-07. https://themattressshop.com/products/cooperflex-pro
[^12]: Mattress On Demand, accessed 2026-06-07. https://shopmattressondemand.com/products/copperflex-pro-memory-foam-mattress
[^13]: Saatva, accessed 2026-06-07. https://www.saatva.com/mattresses/saatva-contour5
[^14]: Business Insider (affiliate listing), accessed 2026-06-07. https://www.businessinsider.com/guides/home/saatva-contour5-mattress-review
[^15]: Mattress Clarity (price list), accessed 2026-06-07. https://www.mattressclarity.com/reviews/saatva-contour5-mattress/
[^16]: DreamCloud (official), accessed 2026-06-07. https://www.dreamcloudsleep.com/mattresses/luxe-hybrid-mattress
[^17]: Mattress Clarity (review with retailer link), accessed 2026-06-07. https://www.mattressclarity.com/reviews/dreamcloud-luxe-memory-foam-mattress-review/
[^18]: Sit 'n Sleep, accessed 2026-06-07. https://www.sitnsleep.com/products/dreamcloud-luxe-hybrid-mattress
[^19]: NapLab (review shows retail prices), accessed 2026-06-07. https://naplab.com/mattress-reviews/nectar-ultra-review/
[^20]: Nectar (product page for Premier series), accessed 2026-06-07. https://www.nectarsleep.com/mattresses/premier-memory-foam-mattress