Noble Slumber Firm King Mattress

The Noble Slumber Firm King Mattress is built to give you the kind of deep, restorative rest, in a size that gives you all the space you need to truly unwind. Arriving rolled and compressed in a compact box, this king mattress is far easier to bring home than its generous proportions suggest. It moves through doorways without stress, sets up without any professional help, and expands into a full king size sleep surface that is ready to use within a day of unboxing. 

At a substantial 182 x 203cm and a generous 30cm deep, this mattress fills a king bed frame with a presence and quality that feels immediately premium, the kind of sleep surface that makes you look forward to bedtime every single evening. Beneath the soft knitted fabric cover, every layer of the Noble Slumber king mattress has been carefully chosen to deliver consistent, reliable support night after night.

Features

Highlight and Key Details for the Noble Slumber Firm King Mattress:

• Mattress in a Box: Arrives rolled and compressed in a compact, lightweight box  straightforward to transport home, carry through tight spaces, and set up entirely without professional help.
• Pocket Spring Support System: Individual pocket springs respond independently to body weight and movement, delivering targeted support across the full king surface while minimising motion transfer between sleepers.
• Even Weight Distribution: The pocket spring system distributes body weight evenly across the entire 182cm king width, reducing pressure points for a more comfortable and deeply restorative sleep.
• Oeko-Tex 100 Certified Foam: An internationally recognised independent certification confirming all foam materials are thoroughly tested and free from harmful substances  safe for your entire household.
• CertiPUR-US Certified Foam: A further respected independent certification ensuring the foam meets strict standards for content, emissions, and long-term durability throughout the mattress.
• Firm Feel: A supportive, structured sleep surface that keeps your spine properly aligned across the full king size  ideal for those who prefer a firmer, more supportive feel through the night.
• Knitted Fabric Cover: A soft, breathable surface fabric that adds a pleasant feel and healthy airflow to the top of the mattress from the very first night of use.
• 30cm Mattress Depth: A generous 30cm profile that pairs beautifully with most king bed frames and gives the mattress a substantial, premium look and feel throughout.
• King Size (W182 x D203 cm): A generous king size that fits comfortably within most standard king bed frames, giving couples and solo sleepers alike plenty of space to stretch out and fully relax.
• Great Value for Money: Certified foam materials, an independent pocket spring core, and a generous 30cm king profile delivered at a price point that makes premium sleep genuinely accessible.

Why You'll Love It

You will love the Noble Slumber Firm King Mattress for the generous space, reliable support, and genuine ease it brings to your sleep from the very first night. The king size gives you all the room you need to sleep comfortably  whether you share the bed or simply love having space to spread out. The pocket spring core responds to your body throughout the night, delivering the kind of firm, consistent support that leaves you feeling properly rested when morning comes.

Explore more from our mattresses collection here.

Usage Tips

Styling and Practical Tips for the Noble Slumber Firm King Mattress

• Allow 24 to 48 hours after unboxing for the mattress to fully expand before sleeping on it  this gives the pocket springs and foam layers adequate time to reach their full king size shape and feel.
• Rotate the mattress every three to six months to encourage even wear across the full king surface and extend the working life of the pocket spring system.
• Use a quality king size mattress protector from the very first night to keep the knitted fabric cover clean and protect the mattress for the long term.
• Make sure your king bed base or slat system provides even, adequate support across the full 182cm width  slats no more than 7cm apart will protect the pocket spring core and maintain consistent weight distribution.