Mattress King Single Size
Upgrade to a king single mattress — the perfect in-between size that offers more width and length than a standard single, without taking up the space of a double or queen. Ideal for growing kids, teenagers, young adults, and compact guest rooms, our premium hybrid king single size mattresses deliver exceptional comfort, support, and durability.
| Features | ES Mattress | Mattress | LUXE Mattress |
|---|---|---|---|
| Mattress Type | Hybrid (spring & foam) | Hybrid (spring & foam) | Hybrid (spring & foam) |
| Spring System | 3 Zone High-Definition Pocket Spring | 5 Zone High-Definition Pocket Spring | 7 Zone High-Definition Pocket Spring |
| Comfort Layers | • FirmCore ™ High-density foam |
• ECOLAY™ Natural Latex • Gel infused memory foam |
• Gel infused GI+ memory foam • EcoRest™ Bio memory foam • Kinetiq™ energy absorbing foam • ECOLAY™ Natural Latex |
| Cover | Tencel™ knitted fabric | Cashmere blend knitted | Cooling Silver Fabric |
| Motion Isolation | Great ★ | Excellent ★★ | Superb ★★★ |
| Edge Support | Reinforced dynamic ✅ | Reinforced dynamic ✅ | Reinforced dynamic ✅ |
| Firmness | +8 ★ | +7 ★★ | +6 ★★★ |
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Frequently asked questions
How do I unpack my mattress?
How do I unpack my mattress?
Your Welcome Pack with opening instructions and an opening ‘tool’ is included inside the mattress box. You can remove the blue outer wrapper with a pair of scissors that have a rounded point, so they don’t puncture the inner vacuum bag or damage the mattress . The mattress can then be unrolled just like a very large newspaper. NB exercise caution while unrolling as the mattress can unroll quickly if the inner vacuum bag has been punctured.
Is their a warranty period for the mattress?
Is their a warranty period for the mattress?
Sleep Republic provides a 12 year warranty on The Mattress sold online. This warranty covers;
- Faulty workmanship or materials.
- Body impressions or visible indentation or sag in the mattress surface, while no weight is applied, of greater than 3.5cm.
In order for the mattress to wear evenly we recommend rotating the mattress 180 degrees every 2 weeks for the first month then once every month for the duration of the warranty period. Failure to rotate your mattress may cause the mattress not to wear evenly and will void the warranty.
This warranty does not cover
- Normal wear and tear from use.
- Minor imperfections that do not affect the performance of the bed. These include slight variations to size and colour.
- Odour. Some materials have a natural or new odour.
- Damage caused by incorrect opening of the mattress or failing to follow delivery and unpacking instructions.
- Handles (where fitted) should only be used to position the mattress and should never be used to carry the mattress or support the full weight of the mattress.
- Use for commercial, rental or other business purpose (including but not limited to hotel use, Airbnb etc.). In such cases the warranty period is 12 months.
- Damage caused by abusive handling, misuse.
- Failing to use the mattress with the proper foundation or base that has support including centre support.
A waterproof & breathable mattress protector is highly recommended at all times of use.
Where do the returned mattresses go?
Where do the returned mattresses go?
We donate all our returned mattresses to charities like the Salvation Army.

