SAIMAZ 4-inch hypoallergenic microfibre mattress topper on a king-size bed
Close-up of the quilted topper surface showing the plush 1200gsm microfibre filling
Mattress topper fitted with elastic strap on a deep mattress up to 40cm
Small double SAIMAZ mattress topper folded flat for easy storage
SAIMAZ extra-thick mattress topper layered on a divan bed with white bedding
Edge detail of the SAIMAZ topper showing strong elastic strap and reinforced stitching
SAIMAZ single-size hypoallergenic microfibre mattress topper, breathable design
Side view of the SAIMAZ mattress topper showing 4-inch / 10cm thickness
Double-size SAIMAZ mattress topper covering a memory foam mattress
Hand pressing the topper to demonstrate the cushioned 1200gsm microfibre filling
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SAIMAZ 4-Inch Mattress Topper – Hypoallergenic Microfibre, Fits 40cm

£25.99
£49.99
£25.99
Please hurry! Only 50 left in stock
Limited-Time Offers, End in: 151D 8H 23M 0S
Size: 4FT DOUBLE
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FREE shipping Offer Valid for 24H Only

Estimated to be delivered in 2-4 Days

Free Returns Accepted in 15 Days

king size mattress topper

SAIMAZ 4-Inch Mattress Topper – Hypoallergenic Microfibre, Fits 40cm

£49.99 £25.99

SAIMAZ 4-Inch Mattress Topper – Hypoallergenic Microfibre, Fits 40cm

£49.99 £25.99
Size: 4FT DOUBLE

Quality sleep starts with the right surface. The SAIMAZ 4-inch / 10 cm mattress topper adds a plush layer of hypoallergenic microfibre to your existing mattress – soft enough to relieve pressure points, supportive enough to hold its shape night after night.

Why this topper

  • 4-inch / 10 cm of plush microfibre – substantial cushioning that genuinely changes how the bed feels.
  • 1200 gsm filling – dense enough to support, soft enough to sink into.
  • Hypoallergenic – resists dust mites and common allergens.
  • Breathable – air circulates freely, so the topper doesn't trap heat the way memory foam can.
  • Fits up to 40 cm deep mattresses – strong elastic straps anchor the topper securely, even on pillow-top and divan beds.
  • Machine washable at 40 °C – easy to keep fresh.

Best for

  • Side sleepers needing shoulder and hip cushioning
  • Back sleepers with mild lower-back pain
  • Anyone with a too-firm mattress
  • Hot sleepers who don't get on with memory foam

UK sizes available

Mattress size Topper dimensions
Single 90 × 190 cm
Small Double 122 × 190 cm
Double 137 × 190 cm
King 152 × 200 cm
Super King 198 × 200 cm

Frequently asked questions

Will it help with back pain?
The 4-inch padding cushions pressure points and supports spinal alignment, which can ease pressure-point pain. It won't fix a sagging mattress – see our mattress topper for back pain guide for more.

Suitable for all seasons?
Yes – breathable microfibre regulates temperature year-round.

How does it fit?
Strong elastic straps anchor the topper to mattresses up to 40 cm deep – keeps it firmly in place all night.

How do I clean it?
Machine washable at 40 °C. Tumble dry on low.

Pair with a mattress protector, or browse the full mattress protectors and toppers collection.

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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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