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Sealy Optimum Firm Mattress

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Up to 35% off
From only  £902.50
With savings up to: £596.50
You save: £596.50
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Order in the next 22 hours 48 minutes 50 seconds for delivery on Tuesday, 19th November

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A firm core mattress with a beautifully knitted cover - drift off into your perfect night's sleep! more info

  • In Stock
  • Free Next Day Delivery
  • Free Two Man Delivery Upgrade
  • Type: Zoned Foam | Geltex
  • Firmness: Firm (5)
  • Depth: 25cm
  • Guarantee: 5 Years
UK Sizes
Superking 6' x 6'6" / 180cm x 200cm Hurry! Limited Stock
  • Tue, 19th Nov 2019 (Free)
  • Wed, 20th Nov 2019 (Free)
  • Thu, 21st Nov 2019 (Free)
  • Fri, 22nd Nov 2019 (Free)
  • Sat, 23rd Nov 2019 (+£17.50)
  • Mon, 25th Nov 2019 (Free)
  • Tue, 26th Nov 2019 (Free)
  • Wed, 27th Nov 2019 (Free)
  • Thu, 28th Nov 2019 (Free)
  • Fri, 29th Nov 2019 (Free)
  • Sat, 30th Nov 2019 (+£17.50)
  • Mon, 2nd Dec 2019 (Free)
  • Tue, 3rd Dec 2019 (Free)
  • Wed, 4th Dec 2019 (Free)
  • Thu, 5th Dec 2019 (Free)
  • Fri, 6th Dec 2019 (Free)
  • Sat, 7th Dec 2019 (+£17.50)
  • Mon, 9th Dec 2019 (Free)
  • Tue, 10th Dec 2019 (Free)
  • Wed, 11th Dec 2019 (Free)
  • Thu, 12th Dec 2019 (Free)
  • Fri, 13th Dec 2019 (Free)
  • Sat, 14th Dec 2019 (+£17.50)
  • Mon, 16th Dec 2019 (Free)
List: £1,499.00 You save £596.50
You pay £902.50 Delivered
  • Benefits
  • Specifications
  • Description
  • Video
  • Guarantee
  • Delivery
  • Benefits

    Hurry! This mattress won't be around forever - once it's gone, it's gone!
    Firm Core of 6cm Geltex and Zoned Foam layers for excellent support
    Sealy Smart Fibres and Tencel fibre technology help to regulate your body temperature
    Purotex offers a cleaner, healthier night's sleep
    Beautifully knitted cover
    Easy-care non-turn mattress
    Firm support
    25cm mattress depth
    5 Year Guarantee
    Made in the UK
  • Specifications



    This product contains Geltex - an all new comfort layer that offers you the ultimate in comfort and support. Geltex delivers triple benefits to offer the perfect sleep solution: incredible body support, ideal pressure relief and unrivalled breathability.

    Knitted Cover

    Knitted Cover

    The mattress is covered in a luxuriously soft knitted cover with the added benefit of being breathable.



    The cover of this mattress incorporates Tencel, an innovative fibre that naturally cools you and manages moisture, much like Coolmax and Outlast. Tencel also discourages bacterial growth and is silky-soft.

    Pressure Relief

    Pressure Relief

    Provides maximal pressure relief, by spreading more of your body's weight across the mattress - less toss and turning, more restful sleep.

    Allergy UK Seal of Approval

    Allergy UK Seal of Approval

    This product has the Allergy UK 'Seal of Approval'. Rest easy knowing that this product will reduce unwanted allergens from your sleeping environment.



    Mattress depth 25cm (9.8") approximately.



    Ideal for those who prefer a firmer level of support.

    No Need To Turn

    No Need To Turn

    This mattress is purposely designed to be single sided for your convenience - there's no need to flip it over, but we do recommend that you rotate the mattress regularly.

    Guarantee: 5 Years

    Guarantee: 5 Years

    This item benefits from a 5 year guarantee.

    Made in the UK

    Made in the UK

    This item has been manufactured in the UK

    Fire Resistant - Low Hazard

    Fire Resistant - Low Hazard

    This product conforms to the BS7177: 2008 standard for domestic use (low hazard) - ideal for use at home

    NBF Approved Product

    NBF Approved Product

    Peace of mind and reassurance - the manufacturer of this item is an approved member of the National Bed Federation's Code of Practice. Click here for more details

  • Description

    The all-new Optimum Firm Mattress from Sealy, drift into the perfect night's sleep!

    The Optimum Firm features a 6cm deep, unique layer of Geltex for an unparalleled level of support throughout the night. Complete with exceptional breathability, you can have the best night's sleep that you deserve!

    A supportive Zoned Foam core allows the Optimum Firm to work with your body for tailored support. Reacting to your body's weight, the foam provides responsive support and pressure relief for your body during the night.

    The beautifully knitted cover features Adaptive fibres to maintain your body's temperature throughout the night. This includes Sealy Smart Fibres, Tencel and Purotex, all of which help prevent the growth of bacteria and dust mites for a healthier, cleaner and fresher night's sleep.

    A firm core mattress for wonderfully firm support and comfort, the Optimum Firm is single-sided for easy care. You'll never need to flip your mattress again, simply rotate it when changing the sheets!

    Hurry! This mattress won't be around forever - once it's gone, it's gone!

  • Video

    About Sealy Optimum

    About Geltex

    Discover the Benefits of Purotex

  • Delivery

    Next Day Delivery With Free Two Man Delivery Upgrade!

    When in stock, you can receive this product the very next day when ordered before 4pm.

    Don't want it tomorrow? No problem! Simply choose your preferred day.

    Free Two Man Delivery Upgrade

    Delivered to the room of your choice absolutely FREE (worth £19.99).

    Your Two Man Delivery Upgrade is applied to your order automatically.

    No Need to Wait in all Day!

    You will receive your items within a two-hour delivery window.

    You will be notified of your time slot the evening prior to your delivery, where possible.

    Mattress RecyclingOptional Mattress Recycling available +£24.99.

    Saturday Delivery

    Perfect for those who are not available during the week.

    Costs £17.50 in addition to any other delivery costs.

    Delivery is on an all-day service, 7am - 8pm, Monday - Saturday.

    For further information, please visit our Delivery page.

  • Guarantee

    Need further assistance?

    Please contact us and we'll be happy to help.

Sealy Optimum Firm Mattress reviews verified by reevooReevoo

Quality of Materials
Value for money
Overall rating
Scores 9.3 out of 10 based on 9 reviews
10 out of 10


London GB .
Firm and comfortable
Confirmed purchase: 22 May 2018
Published on: 01 June 2018
9 out of 10


London GB
Firm, very good support, high quality design
Reviewer left no comment
Confirmed purchase: 25 August 2016
Published on: 17 September 2016
8 out of 10


Bradford GB
Going from memory foam to this mattress is a shock to your system, however i would choose this over a memory foam every time. Had the mattress just over a week and very happy and sleeping much better.
Reviewer left no comment
Confirmed purchase: 24 May 2016
Published on: 08 June 2016
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