Demko™ Organic Mattress – DeLuxe A (Junior) – Dual Firmness

Safe Support For Growing Kids. Designed for children and lighter weight adults. This junior organic mattress offers optimal comfort and adequate spine support. Perfect for restful nights and healthy development.

Firmness: 6.0 / 10 and 7.0 / 10

Layer composition: 6 cm organic latex + 5 cm organic coir fibre + 4 cm organic latex

Total thickness: 16.5 cm / 7,7″ (including 1.5 cm cover)

Weight support: Up to 90 kg (14 stone) 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: 6 cm organic latex
  • Middle layer: 5 cm organic coir fibre
  • Bottom layer: 4 cm organic latex

Firmness options:

  • 6.0 / 10   
  • 7.0 / 10

Rearranged option

  • Top layer: 6 cm organic latex
  • Middle layer: 4 cm organic latex
  • Base layer: 5 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.

A.W.I purchased a mattress from Tomas at…

Verified buyer

I purchased a mattress from Tomas at Demko 5 years ago, the mattress is the most comfortable mattress ever and after 5 years is still like new. I wanted something non toxic, comfortable and good quality and that’s what I got! No smell at all, clean non toxic materials, excellent quality and very comfortable. My daughter has allergies and is sensitive to chemicals and smells etc so I needed the mattress to be totally non toxic. I’ve just purchased a second mattress and will only ever purchase from Demko. Tomas is very knowledgeable, helpful and lovely and remembered my purchase from 5 years ago! Tomas takes the time to answer any questions and is very patient. Amazing customer service.
L. StoneI love our new mattress

Verified buyer

I love our new mattress! I went for the softest junior one, as we switched from an old, very soft memory foam mattress, so didn't want anything too hard this time! It's definitely helped my back and hips, and I find it so comfy! I wish I'd got one sooner!
Ms Louise BroadstockSecond purchase from Demko

Verified buyer

Second purchase from Demko. We have been using the Demko DeLuxe C mattress for 2-3 years now and it is still like new! Recently we bought a DeLuxe A junior for our child who has been using it for a good couple of weeks now. He also finds it very comfortable. Since the first purchase we have moved to Northern Ireland and still received his mattress within 3 weeks. Highly recommended by a happy customer!
Mr A. OzsvathWe bought a Demko organic mattress...

Verified buyer

We bought a Demko organic mattress 2 years ago and still love it. It has maintained its shape perfectly and has no sagging, still as comfortable as at the first night we slept on it. We recently went back to Demko for 2 junior mattresses for our children. Again, we received top quality mattresses, delivered well on time by 2 very polite delivery persons. Before purchase, Amy from Demko gave us all the help to choose the correct mattresses. Highly recommended.
Angie EhingerI just bought my thrid mattress from…

Verified buyer

I just bought my thrid mattress from Demko. The mattresses are excellent and I am so glad we can all sleep on proper healthy mattresses. The service from Tamas was excellent as always
Vicky FinlaysonWhat a wonderful company!

Verified buyer

What a wonderful company!! From start to finish the service was amazing! Tamas is a wealth of knowledge and the products are far superior to any other I researched. I am so happy that I found this non toxic organic company for my family!
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