Silentnight Miracoil Memory Mattress, King Size

Product information

Fall asleep on this memory foam mattress knowing it will support and comfort your body and your recover from the day's events.

Miracoil springs have a unique shape that spreads your weight evenly across the bed, relieving pressure on the most painful parts of your body, like your lower back. The mattress also features a deep layer of body moulding memory foam for ultimate pressure relief with no loss of movement or support.

With Allergy UK approved Purotex® cover, this mattress's cover is 100% natural with friendly bacteria, which reduces mould and moisture, keeping dust-mites at bay and reducing allergens to create a drier, fresher and all round healthier mattress.

Please note: We recommend you visit one of our shops and try out your mattress choice before ordering online. Not all of our Furniture ranges are on display at every branch. Please phone your nearest John Lewis to check before you visit.

0% APR Representative: If you buy this product in our shops, it's eligible for Interest Free Credit, which is available when you spend £1000 or more on selected home products. Terms and conditions apply: find out more

Extend the life of your new mattress with a durable and breathable mattress protector..

Country of Origin
W150 x L200cm
Exclusive to John Lewis
Mattress care Information ‘No turn’ indicates that the mattress should not be turned over or flipped. ‘Rotate regularly’ indicates that the mattress should be rotated from head to toe, but not turned over or flipped.
Rotate regularly
Mattress Size
King Size
Mattress tension
Mattress Type
Pocket Spring
Side stitched Information Hand or machined
Spring count
Tick composition
100% polyester
Tuft Type/Surface Finish
Quilted surface finish
Weight Information Unpackaged weight


  • UK delivery

    Delivered within 7 working days (may be longer for N Ireland and rural areas)
    Find out more
  • International delivery not available


We want you to be happy with your purchase. If you're not, depending on the type of product, you can make free returns in the UK via John Lewis shops, Royal Mail, Collect+, or MyHermes. If you need to arrange collection of large or heavy items, call us on 03456 049 049. For international returns queries, call us on +44 1698 545 454. Find out more about returns.

You'll find returns information on your delivery note. Unless faulty, we'd like you to make your return within 90 days of purchase. Exceptions apply to certain products - find out more about our refund policy.


Mattress & Divan Recycling

The charge for this service includes the removal and recycling of mattresses and divans only, and not bedsteads or headboards.

Please note that we reserve the right to refuse to collect any item we believe constitutes a health and safety risk to our employees, or anyone working on our behalf.

Mattresses and divans will be broken down into their constituent parts and around 98% of this material will be sold for re-use.

Q & As

Rated 2.3 out of 5 by 3 reviewers.
Rated 3 out of 5 by Check the depth! Bought this online, and stupidly didn't check the depth! When it arrived I realised my mistake, tried it on the bed still in packaging and could see it would make my bed far too high. Contacted John Lewis, whose customer service was fantastic as always. Have arranged an exchange and am getting a similar mattress but 9 cms less in depth. To prevent anyone making the same mistake I would recommend checking to see what a 29cm deep mattress will look like on your bed before buying. 10 March 2016
Rated 1 out of 5 by don't buy it! What a disappointment with this mattress. The support is medium and quite comfortable if you are sleeping on your own. If the person lying on the same mattress is moving, you can feel everything. The other problem is that the void inside the mattress works like a fund resonance: it amplifies all the noises. We went to JL in Oxford street to try it before buying and we thought it was fine. I would definitely not recommend this product. 24 October 2014
Rated 3 out of 5 by Comfortable but.... Very comfortable firm mattress but very heavy - so much so that I had difficulty tucking in a sheet and finally decided to banish the mattress to the spare room where the bed doesn't need to be made so often. Doesn't need turning - good - so has no handles - bad as it's therefore really hard to move e.g. from one room to another. Also, I foolishly didn't check its depth , not realising that this could vary: it is so deep that fitted sheets don't fit. Caveat emptor! 27 January 2014
  • 2016-05-26 T11:00:02.873-05:00
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