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Free delivery
60-night sleep trial
Rest Assured Belsay 800 Mattress
Free delivery from Thu, 25th Jun, 2026
- It will be made especially for you, so delivery will be on a date of your choice once it is made. Choose a delivery date at checkout.
Choose your delivery date at Checkout!
- We deliver on the day of your choice.
- Recycling of your old mattress can be chosen at the checkout.
Mattresses & Beds
- 2-3hr time window the day prior to delivery.
- Live tracking & 30mins notice.
- Delivery to the room of choice, unpack option can be chosen in checkout.
Pillows & Rolled Mattresses
- 1hr delivery slot.
- Delivery to the door.
Delivery Pricing Zones
We want you to have peace of mind when choosing your new mattress. Our {{sleep_trial_adjective}} Sleep Trial allows you to use the mattress, not happy - we'll swap it for you!
How it works?
- Use a new mattress protector (add one to your order).
- Sleep on it for at least 30 nights.
- Not perfect? Tell us before {{sleep_trial_time_point}} and we’ll swap it for any other mattress on our site.
- We deliver the new one and collect the old one on the same day – zero hassle.
We’ll collect your old mattress or bed and take it away for responsible recycling.
Add service here or at the checkout
Removal & Recycling
Please note: beds will need to be dismantled prior to our arrival.
£39.00
What will we do with your old bed/mattress?
We will do one of three things:
- A local charity may want it. We have given them many items in the last year
- We may recycle the mattress
- Some mattresses cannot be recycled, and so we use a local disposal service to take care of the goods.
Product Description
The Rest Assured Belsay 800 Mattress has won another fantastic accolade! This mattress has the certificate of "Good Housekeeping Institute Approved!"
The Rest Assured Belsay 800 is a return to the traditional approach that Rest Assured had for many years; hand applied fillings, high quality fibres and a luxurious yet supportive feel. The Belsay is superb value for money and it is easy to see why it has become one of the most popular models in the new collection.
This mattress boasts an efficient and refined Pocket Spring unit at it's core. This unit sees each spring working independently from one another , ensuring excellent orthopaedic support. Furthermore, the springs are made from a thicker gauge of wire, which results in a firmer, more supportive feel to the mattress.
As well as the excellent Pocket Spring unit, the Belsay has a deep pad of fibre fillings. This luxurious cushion is of high density, so not to compromise the firmer feel of this mattress, but has enough give and compression to support the body accurately, which further improves the quality and consistency of the support offered. The fillings include Wool, Cotton and other natural fillings, which are both breathable and incredibly comfortable.
The Rest Assured Belsay is a Hand Tufted mattress, controlling the tension of the mattress perfectly, and ensuring durability and comfort in equal measure. These tufts run right through the mattress, and are designed to bind the surface fillings in place and increase the overall support and strength of the mattress.
The cover material used in this mattress is a fantastic new fabric created by Rest Assured to ensure the mattress remains naturally fresh. The fabric eliminates odour, dust mites and mould, and does so without the use of chemicals.
As a firmer feeling mattress, the Belsay is designed for those who prefer a more supportive feel, and want something that is great value for money. We deliver this mattress to the room of choice for free (in sizes larger than Single).
Reviews
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Warranty
5 Years
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Frequently Bought Together
30 Years of Expertise
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Flexible Payment Plans
350K+ Mattresses Sold
Price Match Promise
If you find a better price, we will beat it by £5.
In the unlikely event that you find a price better than ours, worry not - we'll beat it!
This promise extends from pre-ordering right up to the day of delivery!
We watch our competitors prices and pride ourselves on being the most competitive online. Therefore, if you don't have the time to hunt around for the best price, order with us and we'll honour our price match promise until you have taken delivery of your order. This leaves you safe in the knowledge that you will take delivery as fast as possible, for the lowest price possible!
Also, we do genuinely like to know if our prices are being beaten, so please let us know!
