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Float away on a sea of comfort with the Sleepeezee ActivFlex Response 3600. This mattress combines ultra-responsive ActivFlex Spring Foam, a high pocket and mini comfort spring count for targeted support, and a plush, soft Pillow Top infused with Staycool Gel. It's like sleeping on a cloud that hugs you back, with just the right bounce and blissful, all-night coolness. Triple award-winning in the Expert Reviews 2024 awards and built with an eco-friendly, fully recyclable comfort layer, this soft-medium mattress suits side and combination sleepers, and comes with a 10-year guarantee and a 60-night comfort trial.
A soft-medium Pillow Top hybrid mattress from Sleepeezee, combining a 3600-spring pocket and mini comfort system with ActivFlex Spring Foam and a Staycool Gel layer, best suited to sleepers who want extra cushioning with effective temperature regulation.
Soft Medium Feel - 2/6: A gentle balance of softness and support. Soft Medium is perfect for side sleepers and combination sleepers who want pressure relief with a little more stability and support.
Best for
Not ideal for
3600 Pocket Springs
What it is: A system of individually wrapped springs, each moving independently to respond to your body's shape and weight.
How it helps you sleep: Each spring settles back into place as you move, keeping support consistent across the whole mattress and reducing motion passed on to your partner.
Mini Comfort Springs
What it is: Smaller, individually pocketed springs positioned above the main spring system for greater spring density.
How it helps you sleep: Provides targeted pressure relief and improved weight distribution, reducing motion transfer and promoting better spinal alignment for a more restful, undisturbed sleep.
ActivFlex Spring Foam
What it is: A comfort layer that combines the best of pocket springs and foam, designed to mimic the movement of traditional pocket springs while contouring to your unique body shape. Unlike heat-sensitive foam, it is pressure-sensitive, adjusting instantly to your movements.
How it helps you sleep: Provides personalised support while minimising motion transfer, so you experience less roll-off and disturbance from a sleeping partner. It's also eco-friendly and fully recyclable at the end of its life.
Handcrafted Pillow Top with Staycool Gel
What it is: A plush Pillow Top layer infused with Staycool Gel, adding extra cushioning for a soft, cloud-like feel.
How it helps you sleep: The gel manages moisture and regulates body temperature, keeping you cool and comfortable, while also providing pressure-sensitive support that responds instantly to your body shape.
Staycool Gel Layer
What it is: A pressure-sensitive gel layer that responds immediately to your body shape while managing moisture within the mattress.
How it helps you sleep: Helps regulate temperature so you won't feel too hot in warmer months, while still providing responsive, pressure-relieving support.
Comfort & High Density Support Layer
What it is: Supportive fibre layers positioned beneath the comfort layers, chosen for their rebound properties.
How it helps you sleep: Reinforces the mattress structure beneath the softer layers, helping the mattress keep its shape and supportive feel for longer.
Edge to Edge Foam Encapsulated Support
What it is: A high-density foam strip placed inside the edge of the mattress springs.
How it helps you sleep: Prevents the mattress from sagging at the edges, giving a longer life and a more supportive sleeping area right to the edge of the bed.
Quilted Soft Knit Fabric Cover
What it is: A soft knit cover in 100% polyester with a quilted finish.
How it helps you sleep: Gives a sumptuous, luxurious feel with enhanced comfort against the skin.
Side Stitching
What it is: Reinforced stitching that ties the border fabric to the spring system along the mattress sides.
How it helps you sleep: Supports the mattress walls and extends the usable sleeping area closer to the edge.
Flag-Stitched Handles
What it is: Handles fitted to both sides of the mattress.
How it helps you sleep: Makes it easier to position and rotate the mattress when needed.
| FEATURE | DETAIL |
|---|---|
| Brand | Sleepeezee |
| Category | Mattress |
| Model | ActivFlex Response 3600 |
| Firmness | Soft Medium (2/6) |
| Mattress Type | Pillow Top with pocket and mini comfort springs, ActivFlex Spring Foam and Staycool Gel (hybrid) |
| Pillow Top | Yes |
| Spring System | Pocket Springs & Mini Comfort Springs |
| Spring Count | 3600 |
| Comfort Layers | ActivFlex Spring Foam, Staycool Gel, Comfort & High Density Support Fibre |
| Cover Material | Quilted Soft Knit, 100% Polyester |
| Mattress Depth | 33cm |
| Edge Support | Yes - Foam Encapsulated Support & Side Stitching |
| Motion Isolation | Yes - independently working pocket and mini comfort springs reduce motion transfer |
| Temperature Regulation | Yes - Staycool Gel layer |
| Hypoallergenic | Yes - Staycool Gel |
| Care Instructions | Easy Care - no need to turn, but rotate head to toe regularly to extend lifespan |
| Handles | Yes - Flag-stitched |
| Side Stitching | Yes - side stitched |
| Compatible Bed Bases | Slatted (slats no more than 7cm apart) and divan bases |
| Single or Double Sided | Single sided - do not flip |
| Country of Manufacture | Great Britain |
| Maximum Weight Per Side | 114kg (18st) |
| Guarantee/Warranty | 10 years |
| Mattress Trial | 60 nights |
| Ideal For | Side sleepers, combination sleepers, hot sleepers, allergy sufferers |
| Certifications | Sleepeezee Royal Warrant Holder |
| Fire resistance | BS7177:2008 compliant |
| Sustainability | ActivFlex Spring Foam fully recyclableResponsibly sourced materials |
| Packaging Type | Flat-packed |
| SIZE | WIDTH x LENGTH x DEPTH | WEIGHT |
|---|---|---|
| Single | 90cm (3ft) x 190cm (6ft3) x 33cm (12.9'') | 43kg (94lbs) |
| Small Double | 120cm (4ft) x 190cm (6ft3) x 33cm (12.9'') | 58kg (127lbs) |
| Double | 135cm (4ft6) x 190cm (6ft3) x 33cm (12.9'') | 65kg (143lbs) |
| King Size | 150cm (5ft) x 200cm (6ft6) x 33cm (12.9'') | 71kg (156lbs) |
| Super King Size | 180cm (6ft) x 200cm (6ft6) x 33cm (12.9'') | 85kg (187lbs) |
| Super King Size Zip and Link | 2 x 90cm (3ft) x 200cm (6ft6) x 33cm (12.9'') | 2 x 43kg (94lbs) |
Vs firmer mattresses: The Pillow Top and Staycool Gel give this mattress noticeably more cushioning than a firmer alternative, while the ActivFlex Spring Foam and pocket springs still offer a supportive, stable feel underneath. Firmer mattresses suit heavier sleepers or those who want a more rigid, minimal-sink surface.
Vs softer mattresses: This mattress has more underlying structural support than our softest mattresses, thanks to the 3600-spring pocket and mini comfort system. Softer mattresses can feel more immediately plush but may not maintain spinal alignment as consistently for combination sleepers.
Vs standard memory foam mattresses: ActivFlex Spring Foam is pressure-sensitive rather than heat-sensitive, so it responds instantly to your movements rather than gradually softening with body heat like traditional memory foam. It's also eco-friendly and fully recyclable, unlike most foam alternatives.
The ActivFlex Response 3600 is backed by Sleepeezee's 10-year manufacturer's guarantee against defects in materials and workmanship. Given the quality of the spring system and ActivFlex construction, this is a mattress built to last - the guarantee reflects that.
Expert Reviews 2024 Award - Triple award-winning: recognised for value, brand and comfort by Expert Reviews in 2024, giving confidence in proven sleep quality.
Sleepeezee Royal Warrant Holder - Sleepeezee is a proud supplier to the Royal Households, a standard of craftsmanship that has to be earned and maintained.
The ActivFlex Response 3600 delivers a rare combination of plush Pillow Top comfort and a genuinely sustainable comfort layer, backed by a 10-year guarantee. If you're a side sleeper, tend to sleep hot, or simply want a well-balanced soft-medium feel built with eco-friendly materials, this is one to consider.
Choosing a mattress online takes trust. That's why the ActivFlex Response 3600 comes with a 60 night comfort guarantee - if it doesn't feel right, we'll exchange it. View the full mattress trial policy.
Not sure which Sleepeezee mattress is right for you? See our Mattress Buying Guide for expert guidance on mattress types, fillings and comfort levels.
| WHAT'S INCLUDED? | |
|---|---|
| Mattress | Yes |
| Base | No |
| Headboard | No |
PLEASE NOTE:
All measurements are approximate and are subject to a tolerance of + or - 2cm.
Image is for illustration purposes only.
Pillows, cushions, throws and bed dressings not included.
Making luxury beds in the UK since 1924, Sleepeezee has grown into one of the most well-known bed manufacturers in the world. Proud holders of a Royal Warrant, they are recognised and highly regarded within the industry for their artisanship, innovation, and design quality.
At Land of Beds, we are proud to be able to offer our customers high-quality, luxurious products that are affordable and accessible to all consumers. Our relationship with Sleepeezee dates back many years. Our independent customer reviews rate Sleepeezee products 4.8 out of 5, giving us the confidence to provide Sleepeezee with our seal of approval and our customers' valuable insight when making informed purchasing decisions.
Sleepeezee has built and maintained an enviable reputation for exceptional quality paired with excellent value for money. Sustainability is at the forefront of Sleepeezee's practises, with materials sourced from sustainable suppliers and all timber from sustainably managed forests.
Yes, this mattress is suitable for a slatted base as long as your slats are in good condition and no further apart than 7.5cm.
This is an easycare mattress, which means you do not need to turn the mattress over, however you should rotate from head to toe on a regular basis to ensure even use.
This mattress is 33cm deep.
Gel is a synthetic material that is very similar to memory foam that offers a cooler sleeping surface and has a softer feel. They are both good at pressure relief and reducing disturbance from a sleeping partner.
This mattress uses a pocket spring system that is a series of individual steel springs encased in fabric pockets that are designed to contour to body shape and weight to provide comfort and support.
Yes, we can remove your old mattress at the same time as delivering your new one. You can add this service at checkout.
Made to measure mattresses and divan bases are available – please call 01928 242829.
Our experienced delivery team can take away your old bed or mattress when delivering your new one. Please ensure you have dismantled your old bed prior to delivery.
Simply add this service to your order at checkout.
What products will you remove?
We will remove mattresses, divan beds and bed frames (subject to all beds being dismantled first). Add this convenient service to your order at checkout.
Do I need to dismantle my old bed before collection?
Yes, your old bed must be fully dismantled.
Can I add Removal and Recycle on after placing my order?
You can either add it to your order on the basket page and pay at checkout, or if you would like to add it after you have checked out, simply contact us on 01928 242829 before your order is due for delivery.
Do you recycle the beds and mattresses you collect?
When we remove your old bed or mattress, we ensure that it is disposed of in an environmentally responsible way. All products are sent to The Furniture Recycling Company, the UK's largest and most trusted furniture recyclers.
Our skilled drivers deliver throughout the UK and will deliver straight to your home. Free doorstep delivery is available on many products and you can also choose delivery to room of choice for an additional fee.
How much is delivery?
We offer free delivery to most of the mainland UK for orders over £100; there are applicable charges for deliveries to the highlands or far out UK, which can be found by putting your postcode into the delivery section on the product page. For orders under £100, there is a £10 charge.
How long does delivery take?
Once you select the required product, an approximate delivery time will be quoted on the product page before adding the item to your basket. During checkout, you will either be given the option to select your date, or we will state an estimated time for delivery. Once you have placed your order, we will contact you to book a date within the timeframe quoted.
Will I be contacted beforehand to arrange a delivery slot?
Once you have placed an order, our delivery team will contact you directly to arrange a suitable delivery slot, either via email, call, or text message.
Can I choose my delivery day?
If the product is available for next-day delivery, you can select a date at checkout. For all other products, you will be presented with an estimated timeframe for delivery. After placing your order, our delivery team will contact you via e-mail, text or call to arrange a suitable delivery day/time.
Read all our Delivery FAQs
We have an easy returns policy: If you change your mind, we're happy to accept returns within 14 days of you receiving your product, as long as they are unused and unassembled. However, for hygiene reasons, we can't take back products that have been slept on, unless there's a fault.
Custom-made products can only be returned if they are faulty.
Please take a look at our Terms & Conditions.
Can I return a mattress I've slept on?
Normally, mattresses can only be returned if they're unused within 14 days. But if your mattress has a trial period, please refer to the mattress trial information page for further details.
How long do I have to return an item I've purchased online?
You have 14 days to return an item if bought online, subject to the item not being used or assembled. Please note, if you wish to inspect a mattress, please ensure the protective outer plastic packaging is not removed, as this may affect your right to return due to health and hygiene reasons. Any product that is made to order/customised cannot be returned unless faulty.
Do I have to pay for the return?
To return your product, you can either arrange the return yourself, or we can happily arrange it on your behalf for a charge, which will be deducted from your refund. The collection charge covers the expenses involved in picking up the item from your location and safely bringing it back to our warehouse. For bedding items, the amount is £20, and for large/bulky items, charges start from £95 (depending on the product/postcode).
Can I return a part or fully assembled item?
Unfortunately, once an item is assembled, whether partially or fully, we can't accept returns unless the item is faulty.
Read all our Returns FAQs
Our skilled drivers deliver throughout the UK and will deliver straight to your home. Free doorstep delivery is available on many products and you can also choose delivery to room of choice for an additional fee.
How much is delivery?
We offer free delivery to most of the mainland UK for orders over £100; there are applicable charges for deliveries to the highlands or far out UK, which can be found by putting your postcode into the delivery section on the product page. For orders under £100, there is a £10 charge.
How long does delivery take?
Once you select the required product, an approximate delivery time will be quoted on the product page before adding the item to your basket. During checkout, you will either be given the option to select your date, or we will state an estimated time for delivery. Once you have placed your order, we will contact you to book a date within the timeframe quoted.
Will I be contacted beforehand to arrange a delivery slot?
Once you have placed an order, our delivery team will contact you directly to arrange a suitable delivery slot, either via email, call, or text message.
Can I choose my delivery day?
If the product is available for next-day delivery, you can select a date at checkout. For all other products, you will be presented with an estimated timeframe for delivery. After placing your order, our delivery team will contact you via e-mail, text or call to arrange a suitable delivery day/time.
Read all our Delivery FAQs
We have an easy returns policy: If you change your mind, we're happy to accept returns within 14 days of you receiving your product, as long as they are unused and unassembled. However, for hygiene reasons, we can't take back products that have been slept on, unless there's a fault.
Custom-made products can only be returned if they are faulty.
Please take a look at our Terms & Conditions.
Can I return a mattress I've slept on?
Normally, mattresses can only be returned if they're unused within 14 days. But if your mattress has a trial period, please refer to the mattress trial information page for further details.
How long do I have to return an item I've purchased online?
You have 14 days to return an item if bought online, subject to the item not being used or assembled. Please note, if you wish to inspect a mattress, please ensure the protective outer plastic packaging is not removed, as this may affect your right to return due to health and hygiene reasons. Any product that is made to order/customised cannot be returned unless faulty.
Do I have to pay for the return?
To return your product, you can either arrange the return yourself, or we can happily arrange it on your behalf for a charge, which will be deducted from your refund. The collection charge covers the expenses involved in picking up the item from your location and safely bringing it back to our warehouse. For bedding items, the amount is £20, and for large/bulky items, charges start from £95 (depending on the product/postcode).
Can I return a part or fully assembled item?
Unfortunately, once an item is assembled, whether partially or fully, we can't accept returns unless the item is faulty.
Read all our Returns FAQs
