- 110kg per person
- No-Turn mattress
- Bonnell Coil System
- Dual tempered coils for extra durability
- 100% allergy and odour free foam layers
- W 183cm x L 200cm
- 2-year guarantee & 15-year warranty
Box Top With Open Cell Structure
Luxurious moisture dispensing Viscose Breathe Blue Gel and Hyper Soft polyurethane layers make up the box top layer of the Rest Assured Opera King Mattress Extra Length. Polyurethane foam is manufactured with an open cell structure. The open cell structure allows for better ventilation, therefore resulting in an ultra-hygienic sleep environment.
Bonnell Coil System
The Bonnell shape or hourglass spring is typically manufactured using anything between 3 – 6 coils. The Opera King Mattress Extra Length is designed using 6 coils made in accordance with Alternating Coil Technology (ACTive) and is assembled with knots facing each other, which eliminates the possibility of the spring unit tilting in one direction. The springs are all connected to one another using helical wires running through the top and bottom of the extra length king mattress mattress stopping the springs moving to the side when you apply pressure – giving you an equal spread of tension throughout.
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