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Demko™ Organic Mattress – DeLuxe B – Dual Firmness

Balanced Comfort with Dual Firmness. Enjoy medium-firm support with this organic mattress, crafted to align your body naturally while delivering lasting comfort. Flip it over to explore two firmness levels and discover your ideal sleep surface.

Firmness: 5.5 / 10 and 6.5 / 10

Layer composition: 10 cm organic latex + 3 cm organic coir fibre + 5 cm organic latex

Total thickness: 19.5 cm / 7,7″ (including 1.5 cm cover)

Weight support: Up to 130 kg (20.5 stones) per person, per side

No Adhesives. 100% Organic. Fully Customizable.

We never use adhesives to bond the layers of our mattresses—preserving their purity and ensuring they remain truly organic. This thoughtful design also allows you to rearrange the layers to customize firmness levels, tailoring comfort to your unique preferences within a single mattress.

Layer Composition:

  • Top layer: 10 cm organic latex
  • Middle layer: 3 cm organic coir fibre
  • Bottom layer: 5 cm organic latex

Firmness options:

  • 6.5 / 10   
  • 5.5 / 10

Rearranged option

  • Top layer: 10 cm organic latex
  • Middle layer: 5 cm organic latex
  • Base layer: 3 cm organic coir fibre

Firmness option:

  • 5.0 / 10

GOTS-Certified Organic Mattress Cover

Experience the natural luxury of our certified organic mattress cover, thoughtfully crafted to elevate comfort, purity, and performance.

  • Organic Merino Wool: Soft, silky, and GOTS-certified, this premium wool layer offers exceptional breathability and comfort. Naturally hypoallergenic and dust mite resistant, it is also a powerful thermoregulator—keeping you cool in summer and warm in winter. Durable, sustainable, wool supports deep, uninterrupted rest. 

  • Organic Cotton: Also GOTS-certified, our organic cotton adds a smooth, breathable surface that completes the cover with elegance and durability.

Together, these materials create a clean, chemical-free sleep environment that supports your well-being and reflects our commitment to sustainability. It’s the perfect complement to your organic mattress—gentle on your skin, kind to the planet, and built to last. Wool and cotton are biodegradable, renewable, and eco-friendly — this mattress cover is a responsible choice for conscious consumers.

 

Vegan Mattress Cover with Actipro™ Probiotic Protection

Our mattress features a dual-layer cover system designed for purity, performance, and long-lasting freshness.

  • Inner Cotton Layer: A soft, breathable cotton cover protects the mattress core, ensuring structural integrity and comfort.

  • Outer Tencel™ Cover: Made from responsibly sourced wood pulp, Tencel™ is a natural fiber known for its strength, silky softness, and exceptional moisture management. The knitted surface enhances airflow, helping your mattress stay cool and fresh night after night.

Actipro™ Technology: Natural Defense for a Healthier Sleep

Infused into the Tencel™ fabric, Actipro™ is a probiotic-based treatment that provides safe, effective protection against allergens, dust mites, and odors—without compromising beneficial microflora.

  • Uses active probiotics to naturally inhibit harmful bacteria and allergens

  • Applied using natural clay technology for long-lasting performance

  • A gentle, non-toxic solution ideal for sensitive skin and wellness-focused households

This advanced cover system combines nature’s finest fibers with innovative probiotic science—delivering a cleaner, cooler, and more healthful sleep environment.

Important information

All our organic mattresses are GOLS and GOTS certified.

Organic mattresses need to be used on an appropriate, strong, supportive slat base which is able to hold the mattress’ and its users’ weight without becoming hollow. Gaps should be around 2 inches wide. Gaps are needed to help the mattress ‘breath’. This applies to all types of organic mattresses.

All our mattresses comply with BS7177 and BS5852, low hazard domestic use and medium hazard hotel use.

Care instructions for our mattresses

Our mattresses are two sided and you can use both sides. The side with the big product sticker attached to the cover is normally the top.

Take extreme care whilst moving the mattress as the latex can tear if grabbed or pulled on corners or edges.

Rotate the mattress from top to bottom and flip it over once every 3 months in the first 2 years. Then once a year, which will ensure even wear and tear and will prolong its lifespan.

You can air the mattress every time you change your bed linen to keep it fresh and dry.

Never use detergents or chemical cleaners on your mattress. This can adversely affect not only the fabrics but also the fillings inside.

The mattress must be kept dry. If there is a risk of accidents with fluids, please use a waterproof mattress protector.

If you spill something on your mattress and it gets wet, wipe the liquid with a cloth, remove the cover and air the mattress core till it is dry. 

Our covers are zip-off removable and washable by hand wash at 20 maximum at 30 degrees. Do not wash the cover at a higher temperature as it may shrink. Do not tumble dry and do not dry clean it.

The mattress can not be used on boarded, closed or not adequately ventilated bed bases or on the floor as the lack of ventilation may lead to mould and mildew build up and invalidates your guarantee. We recommend slatted bases. The gaps between the slats should be between 2 and 4 inches wide.

The mattress is designed for sleeping on and constant sitting on the edge can cause damage and place undue stress on this area of the mattress.

Please keep packaging away from children. 

We are rated excellent by our customers.

Trustpilot
Kerstin BoschanBest Buy by Which? Best buy for us 🙂

Verified buyer

We have found Demko on Which? as their Best Buy, scoring the highest among organic mattress retailers. We contacted their office to discuss which mattress would be the most suitable. They gave us all the help in choosing the correct firmness. We went for the DeLuxe B. I wanted to wait with the review until we had been using it for a few weeks. I think it is safe to say this is the most comfy mattress we’ve ever had. If you are looking for an organic mattress do not hesitate to contact Demko 🙂
Liam TooleWe have been using our Delux B mattress…

Verified buyer

We have been using our Delux B mattress for over a month now and we are 110% satisfied with it. It provides a high level of comfort and support at the same time which is what we really wanted. Great experience! Thank you Demko!
GaborGreat products

Verified buyer

We have bought the DeLuxe B which proved to be the most comfortable mattress we have ever had. It supports well and perferctly comfortable at the same time. Top quality product, not cheap but worth its price. The delivery was quick, we received it well before the given lead time. Spot on company and mattress.
Brygida M.I can only praise Demko!

Verified buyer

My husband and I are in our late 50's and during our journey in life we have slept on many different mattresses, but none of those come close to the comfort of our Demko mattress. Tamas at Demko has a huge knowledge about mattresses and beds and when we decided to change from our mainstream mattresses to latex mattress his superior knowledge in comparison to other salespeople we spoke to made a huge difference and gave us the confidence we needed to go ahead with our purchase. We purchased a king size DeLuxe B mattress but held off leaving a review for 2 months so that anyone reading this will know that we still feel the same about the mattress comfort and quality after trialling it for this period as we did after the first night we slept on them. We absolutely love it! I have always been a light sleeper and have occasionally suffered from back and lower back pain, it used to take me a while to get back to sleep after waking up during the night, but after sleeping on my new Demko mattress I noticed that I get back to sleep much sooner than before and the pain has diminished to the point where I rarely get any. I would also like to mention that our order was processed quickly and arrived well within the stated leads time. The dellivery crew were super polite and professional. I can only praise Demko!
Deborah CollinsI purchased a delux b mattress in Jun…

Verified buyer

I purchased a delux b mattress in Jun and I'm absolutely stoked with the purchase and comfort of the mattress! Amy and the team were incredibly helpful throughout the entire process and have cleared up questions I had. I am always raving about my mattress to others and recommend at any given chance. This is a A++ mattress!
J. FurphyWe purchased our Demko DeLuxe b…

Verified buyer

We purchased our Demko DeLuxe b mattress in July after much research and wanting a chemical free and safe option for ourselves and our kids. Only one month and we are LOVING this bed. We have tried 3 different beds in the past 10 years and always the same problem, aching back, pins and needles and sore hips. Within a week all of that was gone and I wake up feeling my spine is aligned and rested. I would say I'm sleeping deeper as well as i don't wake up every time I turn over or because something hurts. Demko’s customer service were helpful and courteous every step of the way, we will be buying another one when our daughter is ready for her first single bed. Worth every penny. THANK YOU!
Ms Paige WarringtonWe are utterly satisfied with our…

Verified buyer

We are utterly satisfied with our Demko's DeLuxe B latex-coir firm mattress which has perfect support and no pressure points. We received it within the stated time frame. After a few days of getting used to our first latex-coir mattress, we are sleeping better than ever without constant tossing and turning. Great investment, perfectly made mattress.
Tom PepperAbsolutely love our mattress

Verified buyer

Absolutely love our mattress! I'm writing this after a super comfy night of sleep. I don't have any particular back problem or anything like that, but wanted an eco mattress (i.e. no synthetic materials, no off-gassing fire retardents etc) and am really chuffed we went with this as it's so comfortable on top of it's eco credentials. We went for the DeLuxe B - UK King, and find it to be just the right level of firmness. Tamas was great, very helpful, and the service was very efficient. 5 Stars from me.
MarkRest assured

Verified buyer

If you are in any doubt, rest assured ....... and you will, Demko offer an outstanding product and service. I did extensive research when looking for a new mattress, decided natural organic latex was right for us and then contacted numerous suppliers. Having never slept on latex before, I questioned their products thoroughly, probably more than anyone has a right to and it became obvious that Demko offered a far superior product. Tamas was always helpful, patient and quick to call back if he was unavailable when I called. I eventually opted for a custom configuration as I was unsure on firmness / softness of the mattress and this offered many different options. However this was probably unnecessary - from the first night my spine felt aligned and it is an absolute joy to sleep on this mattress. Both my partner and I sleep better than ever before and are so glad we found Demko - it really is worth every penny. Thank you so much Tamas and team!
Tim O’NeillWe have had the DeLuxe B for 5 months…

Verified buyer

We have had the DeLuxe B for 5 months now and have been extremely pleased with it. Like most we looked around a bit and tried a few of the mattresses found in the local shops but after doing the research and reading the reviews, we chose this one from Demko and couldn't be happier. We had sprung and memory mattresses before but this mattress is on a completely different level regarding comfort and support. I gladly recommend this mattress without hesitation. If you are concerned because you can't try it out before you buy it you shouldn't be. It has been wonderful!
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