For sumptuous full-body cushioning paired with innovative support, discover the Sleepeezee ActivFlex Response 3600 Memory Mattress, designed by the UK's leading sleep manufacturer.
A core unit of a combination of mini comfort springs and full-size traditional pocket springs provides targeted support to key areas of your body, ensuring you receive essential posture control. An innovative layer of ActivFlex™ spring foam combines the benefits of both of these supportive features, providing precise pressure relief to your body while effortlessly moulding to it like foam. These support systems, with an additional layer of up to 1000 mini comfort springs in the pillow top of this mattress, provide incredible support without compromising the soft feel of your sleep surface.
Also within the sumptuous pillow top layer of this mattress - which acts as a gorgeously comfortable mattress topper - is a layer of Staycool™ gel. This cooling gel actively draws heat away from your body, providing a consistently refreshing sensation from head to toe. In fact, you'll find two layers of this clever material within your Sleepeezee ActivFlex Response 3600 Memory Mattress, making it an exceptionally breathable, cool foundation for sleep.
Soft polyester comfort layers provide additional full-body cushioning, letting you enjoy that weightless 'sink in' feeling your body craves after a long, tiresome day. A luxuriously soft knitted cover finishes this mattress with a final touch of sumptuousness, while the one-sided, no-turn design of the mattress makes regular care a breeze.
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We provide our award-winning Free Next Day Delivery service to most locations, sending a proper night’s sleep out far and wide. Hassle-free and convenient, you can even choose a time and day that suits you, have us take your old mattress away for recycling, and get us to deliver to your room of choice!
In some places, a small fee will be charged to help us get you your best night’s rest as quickly as possible. Take a look at the following postcodes to see if this applies to you, and if you’re not sure, then use our helpful Postcode Checker to help you shop with confidence.
Sleepeezee 10 Year Guarantee
Sleepeezee are confident that all of their beds and mattresses are made to the highest standards. Therefore they offer a 10 year guarantee across their entire range of mattresses and divan bed sets.
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Buy now, pay later with Klarna
18+, T&Cs apply, Credit subject to status
| Size | Imperial | Metric |
|---|---|---|
| Small Single | 2'6" x 6'3" | 75cm x 190cm |
| Single | 3' x 6'3" | 90cm x 190cm |
| Small Double | 4' x 6'3" | 120cm x 190cm |
| Double | 4'6" x 6'3" | 135cm x 190cm |
| King Size | 5' x 6'6" | 150cm x 200cm |
| Super King | 6' x 6'6" | 180cm x 200cm |
| European Small Single | 2'8" x 6'6" | 80cm x 200cm |
| European Single | 3' x 6'6" | 90cm x 200cm |
| European Double | 4'7" x 6'6" | 140cm x 200cm |
| European King Size | 5'3" x 6'6" | 160cm x 200cm |
All mattress sizes given are approximate and stated sizes refer to the sleeping surface only. Mattresses sizes may vary slightly from their stated dimensions due to manufacturing tolerances, please allow +/- 20mm.
You can spread the cost of purchases over £400 without any fees or interest thanks to our partnership with Klarna, a payment service provider.
Available payment options
18+, T&Cs apply, Credit subject to status. Bedsonline.biz Ltd is authorised and regulated by the Financial Conduct Authority (FCA FRN 710091) and acts as a credit intermediary and not a lender, offering credit products provided exclusively by Klarna Bank AB (publ). Finance is only available to permanent UK residents aged 18+, subject to status, terms and conditions apply. Klarna’s [Pay in 3 instalments] [and] [Pay in 30 days] are unregulated credit agreements.Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. Ts&Cs and late fees apply.
*Delivery charges may apply for some areas. Please see our delivery page for more information.
1. Order by 6pm for next day delivery between Monday-Friday, 12pm on Saturday and 3pm on Sunday. The 'Order by' time may be subject to change dependant on our delivery partners.
Bedsonline.biz Ltd is authorised and regulated by the Financial Conduct Authority (FCA FRN 710091) and acts as a credit intermediary and not a lender, offering credit products provided exclusively by Klarna Bank AB (publ). Finance is only available to permanent UK residents aged 18+, subject to status, terms and conditions apply.
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