Tuesday 2nd June: We're still open and delivering. Read how we're keeping you safe
Your Basket
0 items
Your shopping basket is empty
Need help? Call us on 01709 780881
Mon - Sat
9:30am - 5.30pm
10:00am - 4:00pm

Sealy Activsleep Ortho Posture Firm Support Mattress

Product options:
Up to 15% off
From only  £339.99
With savings up to: £85.04
In stock:
Order in the next 14 hours 20 minutes 18 seconds for delivery on Thursday, 4th June

Choose your Delivery Date:

Add to Basket
Please make the following selections and click Buy to add the item to your basket:


Sleep well and wake ready to take on the day ahead. With an orthopaedic, firmer feel, this mattress cares for you as you sleep and supports you where you need it most. Hypoallergenic and approved by Allergy UK. more info

  • Free Delivery
  • Type: Orthopaedic | Standard Sprung
  • Firmness: Firm
  • Depth: 24cm
  • Guarantee: 5 Years
UK Sizes
Single 3' x 6'3" / 90cm x 190cm
Delivery: Please call
You pay £339.99 Delivered
Small Double 4' x 6'3" / 120cm x 190cm
Delivery: Please call
You pay £399.99 Delivered
Double 4'6" x 6'3" / 135cm x 190cm
Delivery: Please call
You pay £429.99 Delivered
King Size 5' x 6'6" / 150cm x 200cm
Delivery: Please call
You pay £479.99 Delivered
Superking 6' x 6'6" / 180cm x 200cm In Stock Now
  • Thu, 4th Jun 2020 (Free)
  • Fri, 5th Jun 2020 (Free)
  • Sat, 6th Jun 2020 (Free)
  • Sun, 7th Jun 2020 (Free)
  • Mon, 8th Jun 2020 (Free)
  • Tue, 9th Jun 2020 (Free)
  • Wed, 10th Jun 2020 (Free)
  • Thu, 11th Jun 2020 (Free)
  • Fri, 12th Jun 2020 (Free)
  • Sat, 13th Jun 2020 (+£17.50)
  • Mon, 15th Jun 2020 (Free)
  • Tue, 16th Jun 2020 (Free)
  • Wed, 17th Jun 2020 (Free)
  • Thu, 18th Jun 2020 (Free)
  • Fri, 19th Jun 2020 (Free)
  • Sat, 20th Jun 2020 (+£17.50)
  • Mon, 22nd Jun 2020 (Free)
  • Tue, 23rd Jun 2020 (Free)
  • Wed, 24th Jun 2020 (Free)
  • Thu, 25th Jun 2020 (Free)
  • Fri, 26th Jun 2020 (Free)
  • Sat, 27th Jun 2020 (+£17.50)
  • Mon, 29th Jun 2020 (Free)
  • Tue, 30th Jun 2020 (Free)
  • Wed, 1st Jul 2020 (Free)
  • Thu, 2nd Jul 2020 (Free)
  • Fri, 3rd Jul 2020 (Free)
  • Sat, 4th Jul 2020 (+£17.50)
  • Mon, 6th Jul 2020 (Free)
  • Tue, 7th Jul 2020 (Free)
  • Wed, 8th Jul 2020 (Free)
  • Thu, 9th Jul 2020 (Free)
  • Fri, 10th Jul 2020 (Free)
  • Sat, 11th Jul 2020 (+£17.50)
  • Mon, 13th Jul 2020 (Free)
  • Tue, 14th Jul 2020 (Free)
  • Wed, 15th Jul 2020 (Free)
  • Thu, 16th Jul 2020 (Free)
  • Fri, 17th Jul 2020 (Free)
  • Sat, 18th Jul 2020 (+£17.50)
  • Mon, 20th Jul 2020 (Free)
  • Tue, 21st Jul 2020 (Free)
  • Wed, 22nd Jul 2020 (Free)
  • Thu, 23rd Jul 2020 (Free)
  • Fri, 24th Jul 2020 (Free)
  • Sat, 25th Jul 2020 (+£17.50)
  • Mon, 27th Jul 2020 (Free)
  • Tue, 28th Jul 2020 (Free)
  • Wed, 29th Jul 2020 (Free)
  • Thu, 30th Jul 2020 (Free)
  • Fri, 31st Jul 2020 (Free)
List: £549.99 You save £85.04
You pay £464.95 Delivered
  • Benefits
  • Specifications
  • Description
  • Video
  • Guarantee
  • Delivery
  • Benefits

    Part of Sealy's Activsleep mattress range - designed for a healthy, active lifestyle
    An orthopaedic and highly supportive mattress
    Ideal if you love a firmer feel
    Featuring Sealy's PostureTech Core Support spring system
    Core Support delivers plenty of support to the areas you need it most
    Smooth knitted fabric cover provides a plush, cushioned feel
    The cover is micro-quilted to secure the fillings and improve durability
    Adaptive® technology keeps you cool, fresh and dry as you sleep
    Purotex probiotics are infused within the cover and help prevent bacteria and dust mites
    The clever cover technology provides a cleaner, fresher mattress feel
    Hypoallergenic and approved by Allergy UK for your total peace of mind
    Single-sided mattress and easy to care for - no need to turn over
    Depth: 24cm
    Made in the UK
    5 Year Guarantee
  • Specifications

    PostureTech Core Support Springs

    PostureTech Core Support Springs

    Distributes weight evenly for excellent body support and pressure relief

    Soft white fibres

    Soft white fibres

    Comfortable and great value for money

    Knitted cover

    Knitted cover

    Beautifully soft and breathable

    Orthopaedic support

    Orthopaedic support

    Specially designed to provide enhanced support and care for your back



    Reduces allergens for a cleaner, healthier sleep

    Approved by Allergy UK

    Approved by Allergy UK

    This product is scientifically proven to remove common allergens



    Firmer and more supportive

    24cm deep

    24cm deep

    About 9.4 inches deep



    There's no need to flip your mattress over, simply rotate

    5 Year Guarantee

    5 Year Guarantee

    For your peace of mind

    Handcrafted in the UK

    Handcrafted in the UK

    This product supports our economy and helps reduce environmental impact

    Fire Resistant

    Fire Resistant

    This product conforms to BS7177: 2008, for use at home

    Approved by the National Bed Federation

    Approved by the National Bed Federation

    For the highest standards of quality and safety

  • Description

    Start your day with a spring in your step with the Sealy Activsleep Ortho Posture Firm Support Mattress!

    Part of Sealy's Activsleep mattress collection, the Activsleep Ortho Posture Firm Support is a wonderfully supportive, firm mattress. It's a great choice if you're looking for plenty of orthopaedic support to care for your back.

    Featuring Sealy's PostureTech Core Support spring system, you'll enjoy all the comfort and support you need to sleep well. This clever spring system actually gets firmer as more pressure is applied. The result is tailor-made support for your unique shape and weight.

    The Ortho Posture Firm Support is wrapped in a beautifully designed knitted fabric cover for a plush feel. This cover is micro-quilted, to help lock in the fillings and provide long-lasting comfort.

    This mattress doesn't just look good - it actively works to keep you feeling fresh, clean and healthy too! It's all down to the Purotex and Adaptive® technology.

    Purotex probiotics are infused within the cover. These tiny microcapsules are released as you sleep, to fight against dust mites and bacteria. It's hypoallergenic and approved by Allergy UK, too. Adaptive® technology helps to regulate your body temperature and reduces moisture, so you'll always feel cool, fresh and dry.

    It's easy to keep your brand new mattress in great condition. As it's single-sided there's no need to turn it over but we do recommend that you rotate it regularly from head-to-toe.

    Enjoy all the orthopaedic support you need, and wake feeling ready to take on your day with the Sealy Activsleep Ortho Posture Firm Support Mattress!

  • Video

    About Sealy Activsleep

    About Sealy Activsleep Ortho

  • Delivery

    Next Day Delivery or Choice of Delivery Day

    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 a different day in the basket.

    Available with the following delivery options:

    Free Delivery

    Delivered to the door of your building absolutely FREE.

    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.

    Two Man Delivery +£20

    Conveniently delivered to the room of your choice.

    Mattress RecyclingOptional Mattress Recycling available +£25.

    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 - Friday.

    For further information, please visit our Delivery page.

  • Guarantee

    Need further assistance?

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

Sealy Activsleep Ortho Posture Firm Support Mattress reviews verified by reevooReevoo

Quality of Materials
Value for money
Overall rating
Scores 9.0 out of 10 based on 58 reviews
10 out of 10


Lincoln. GB Likes good service.
Reviewer left no comment
No, service very good and really pleased with our firm mattress.
Confirmed purchase: 04 May 2020
Published on: 01 June 2020
9 out of 10


Warwickshire GB
Love the full body support I get from this mattress.
Would prefer a cool feel fabric covering the mattress.
Confirmed purchase: 04 April 2020
Published on: 31 May 2020
Need a little help?
Go to Advice Give us a call