Silentnight Castleton 800 Pocket Eco Mattress


SKU: 940 Category: Brand:


Discover the ultimate in sleep comfort and sustainability with our Silentnight Castleton 800 Pocket Eco Mattress. This UK-made mattress strikes a perfect balance of support and softness while caring for the environment. Its medium comfort grade ensures a pleasant sleeping experience for a variety of sleepers, allowing you to drift into the ultimate sleep haven every night.


The Silentnight Castleton mattress isn’t just another standard product. It boasts innovative Mirapocket® spring technology, offering unique zoned support tailored to your body. The mattress has eco-awareness instilled into its very make-up, with its Eco Comfort Fibres™ literally spun from recycled plastics. This not only contributes positively to the environment, but they also enhance breathability to keep you cool all night long.

Designed with a sumptuously soft hypoallergenic knitted cover, this mattress also caters to those with sensitive skin or allergies. It comes with the added assurance of a 100 Night Comfort Guarantee and a noteworthy five-year guarantee.


This Silentnight Castleton 800 Pocket Eco Mattress is ideal for anyone seeking a mattress that offers all-round support as well as sustainable credentials. Its medium comfort grade caters to the wide majority of sleeping positions and patterns, making it an excellent choice for most sleepers. In addition, the comforting hypoallergenic properties of the mattress cover ensures that it is suitable for those with allergies, ensuring a peaceful, uninterrupted sleep.

Other Things Worth Mentioning

One of the many perks of this mattress is that it is not only exclusive online, but it’s also single-sided, eliminating the need for regular turning. Plus, Silentnight’s focus on sustainability goes above and beyond with their proprietary recycling scheme, meaning even at the end of its life, the Silentnight Castleton 800 Pocket Eco Mattress won’t contribute to landfill waste. Upon purchasing, you also have the chance to cover your investment with a Bedcover Service Plan for up to 8 years. Now, how’s that for peace of mind?

Reasons to Buy

Comfort, sustainability and quality – the Silentnight Castleton 800 Pocket Eco Mattress delivers on all three fronts. It offers individual zoned support while reducing your carbon footprint, making it not only comfortable and supportive but also environmentally friendly. The 100 Night Comfort Guarantee and 5-year guarantee underscore Silentnight’s commitment to quality, giving you added assurance in your purchase. Moreover, the added breathability properties ensure you stay cool and comfortable throughout the night, enhancing your overall sleep experience.

Additional information


Free Delivery on All Orders*

At SleepSafeSleepSound, we believe that the journey to a restful night’s sleep should be as seamless as possible, and that includes the delivery process. We are proud to offer free delivery on all orders, with no minimum purchase required. Our commitment to customer satisfaction extends from the moment you select your perfect mattress to the time it arrives at your doorstep, and beyond.

Delivery Across the UK to Your Room of Choice

We understand that a mattress is more than just another piece of furniture; it’s an investment in your well-being. That’s why we don’t just drop off your mattress at the curb. Our professional delivery team will bring your new mattress directly to your room of choice, whether it’s the master bedroom, a guest room, or even a third-floor flat. We aim to make the process as convenient and hassle-free as possible.

Schedule at Your Convenience

We know that your time is valuable. To accommodate your busy schedule, we offer delivery slots from Monday to Saturday, between the hours of 7am and 6pm. When completing your order, you’ll have the opportunity to select a delivery date and time that works best for you. Our team will also provide you with a call or text notification on the day of delivery, so you’ll know exactly when to expect us.

Additional Information

Please note that while delivery is free, some additional services such as old mattress removal or assembly may incur a small fee. For more details, please refer to our Terms and Conditions or contact our Customer Service team for clarification.

To ensure that your mattress remains in pristine condition for years to come, we’ve compiled the following expert recommendations:

Say No to Bending and Jumping

While it might be tempting to use your mattress as a makeshift trampoline, bending or jumping on it can compromise its structural integrity. This can lead to premature sagging and reduce the effectiveness of its support features.

Prioritise Linen Hygiene

A clean bed is a happy bed. We recommend washing your bed sheets, pillowcases, and other linen every one to two weeks. This not only keeps your sleeping environment fresh but also helps to minimise the accumulation of dust mites and allergens.

Invest in a Quality Mattress Protector

A mattress protector acts as a safeguard against accidental spills, stains, and even allergens. By using one, you’re not just keeping your mattress clean; you’re also preserving its aesthetic appearance and overall longevity.

Daily Aeration is Key

Your mattress needs to breathe just like you do. Make it a habit to pull back the covers each morning and let your mattress air out for a bit. This simple act helps to dissipate moisture, reduce odors, and maintain a more hygienic sleep surface.

Rotation Rituals for Single-Sided Mattresses

If your mattress is single-sided, it’s crucial to rotate it from head to toe. For the first three months, make this a weekly routine. After that initial period, shifting to a monthly rotation will suffice. This practice helps to ensure even wear and tear, thereby extending the lifespan of your mattress.

Prompt Attention to Spills

Accidents happen, but quick action can prevent a small spill from becoming a big problem. If you do experience a spill, clean it up immediately using warm, soapy water and a soft cloth. This will help to prevent the liquid from seeping deep into the mattress, where it could cause long-term damage.

Small Single

  • Dimensions: 75 cm x 190 cm (30 inches x 75 inches)
  • Ideal for: Children, small guest rooms

Standard Single

  • Dimensions: 90 cm x 190 cm (36 inches x 75 inches)
  • Ideal for: Children, teenagers, single adults, guest rooms

Small Double

  • Dimensions: 120 cm x 190 cm (48 inches x 75 inches)
  • Ideal for: Single adults who want more space, couples with limited room space


  • Dimensions: 135 cm x 190 cm (54 inches x 75 inches)
  • Ideal for: Couples, single adults who want ample space


  • Dimensions: 150 cm x 200 cm (60 inches x 79 inches)
  • Ideal for: Couples who want more space, master bedrooms

Super King

  • Dimensions: 180 cm x 200 cm (71 inches x 79 inches)
  • Ideal for: Couples who want maximum sleeping space, luxury suites

These dimensions are standard, but it’s always a good idea to double-check specific measurements, especially if you’re buying a bed frame or accessories like fitted sheets.