Availability: In stock
1-3 Working Days
Product Details
- Made in the UK
- Extra-firm orthopaedic mattress with 20cm high-density reflex foam core
- Reflex foam for superior resilience and long-term support
- Completely silent all-foam construction - no springs, no noise
- CoolTouch quilted zip cover that's removable and washable
- Hypoallergenic throughout suitable for allergy-sensitive sleepers
- CertiPUR-US certified foam so no harmful chemicals
- BS 7177 UK fire safety compliant, vacuum-packed for simple delivery
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Delivery Info
Maximum Support for Those Who Need It Most
Some sleepers simply can't get comfortable on a standard mattress. If you wake with back pain, have been recommended a firmer sleeping surface by a healthcare professional, or have found that conventional spring mattresses leave you feeling under-supported, the Harbour Extra Firm Mattress was made for you.
Its 20cm core of high-density reflex foam (Grade 40/300) delivers exceptional resilience holding its shape firmly beneath your body and maintaining proper spinal alignment throughout the night. This is a genuinely extra-firm mattress, not just marketed as one.
Why Grade 40/300 Reflex Foam Matters
Not all foam is equal. The Grade 40/300 specification means this reflex foam has a higher density and greater resistance to compression than standard foam used in mid-range mattresses. In practice, this translates to a mattress that distributes your body weight evenly across the full surface, reducing pressure on any single point while maintaining a firm, stable base that doesn't soften or sag over time.
The all-foam construction has a further benefit: complete silence. There are no springs to creak or adjust, making the Harbour a particularly good choice for light sleepers or those who share a bed.
Practical Details That Make a Difference
The CoolTouch quilted zip cover adds a soft layer of surface comfort without undermining the firm feel beneath. It removes fully for machine washing, and the hypoallergenic treatment makes it a practical choice for those with dust mite sensitivities.
Manufactured in the UK to BS 7177 fire safety standards and CertiPUR-US certified, the Harbour arrives vacuum-packed and rolled, ready to use within hours of delivery.
Explore our firm mattress collection, or browse all options across our full mattress range.
Mattress Size Guide - Check Your Dimensions
| Height | Width | Depth | |
| Small Single | 20cm | 75cm | 190cm |
| Single | 20cm | 90cm | 190cm |
| Small Double | 20cm | 120cm | 190cm |
| Double | 20cm | 135cm | 190cm |
| King | 20cm | 150cm | 200cm |
| Super King | 20cm | 180cm | 200cm |
Density/Firmness Rating - What's Best For You?
Each type of mattress varies by comfort grade, from soft to firm. Our density ratings (provided by the manufacturer) are to be used as a guide. Every comfort grade has its advantages, and the right one for you depends on your personal preferences but also your favoured sleeping position.
The Harbour Support Foam Extra Firm Mattress is rated as Extra Firm
| Soft | Offers the least resistance, providing a gentle support base, contouring to your natural body shape. Perfect for side sleepers. |
| Medium | Gentle support system, conforming to the shape of your body. Great if you sleep on your side or front. |
| Firm | Provides essential support to maintain natural spinal alignment. Ideal for back or front sleepers. |
| Extra Firm | Provides increased support to maintain natural spinal alignment. Ideal for back or front sleepers. This extra support helps your body maintain good posture and prevents your back from curving. |
- This mattresses is rolled and vacuum packed, so should be removed from the packaging as soon as possible after delivery
- Once unrolled, please allow up to 24 hours for the mattress to fully expand and recover to its intended shape and comfort level
- During the first few hours, the mattress may feel slightly firmer than expected – this will settle as it fully expands
- Some customers may notice a slight, harmless smell when first opening the mattress. This is known as off-gassing, which is normal for newly manufactured foam products. The smell is temporary and typically dissipates within a few hours to a couple of days. We recommend placing the mattress in a well-ventilated room during this time to help the process
Comparison Table
| Frostwell Cool Blue Foam |
Keswick Ortho Memory |
Northwick Cool Blue 2000 |
Ashbourne Memory 2000 |
Harbour Extra Firm |
Meadow Eco Sprung |
|
| Depth | 20cm | 20cm | 20cm | 20cm | 20cm | 19cm |
| Firmness | Medium | Firm | Medium | Medium | Extra Firm | Medium |
| Construction | 3-Layer Foam | 3-Layer Foam | Pocket Spring + CoolBlue Foam |
Pocket Spring + Memory Foam |
Single-Layer Reflex Foam |
Coil Spring + Eco Foam |
| Spring count | — | — | 2,000 | 2,000 | — | Coil spring |
| Cooling tech | ✓ | ✗ | ✓ | ✗ | ✗ | ✗ |
| Orthopaedic | ✗ | ✓ | ✗ | ✗ | ✓ | ✗ |
| Removable cover | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Hypoallergenic | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
Material : Polyester Cover | 20cm Reflex Foam
Dimensions : (H) 190cm | (W) 90cm | (D) 20cm
Dimensions
Delivery & Returns
Delivery
We offer delivery to all UK addresses, with thousands of products available on Express Delivery at no extra charge. UK mainland delivery is charged as follows;
For Highlands and Islands, surcharges are calculated based on your postcode at checkout.
""Delivery Type"" denotes the type of service to expect.
2 Person or Specialist Team deliveries are a booked service. Please ensure mobile numbers are provided in checkout to allow the carrier to arrange delivery with you. Due to health and safety restrictions, there may be limitations on “room of choice” with a two-person team. Please discuss your request during your booking-in call.
""Delivery"" denotes the delivery window in which you can expect to receive your goods.
Please note: Where delivery is stated in days or weeks, these are working days and not consecutive calendar days. The first working day following your order date is day one. Orders which contain pre-order items on an extended lead time will be held until all items are ready for despatch.
Delivery charges post-order despatch are non-refundable as per our terms and conditions. .
Returns
Unwanted or unsuitable items will incur collection & administration fees. Full details can be found in our returns policy here .
Sustainability
Roseland will only work with manufacturers who value sustainability standards. Ensuring their partners evaluate and feedback on environmental, human, and social impacts of their furniture products for manufacturing, facility, and organisation.
We are committed to developing products that are ethically sourced, from sustainable materials and ensuring our values are shared throughout our supply chain.
