Thermasleep · Smart mattress cover
Your side warm.
Their side cool.
A water-powered cover that cools your existing mattress to 12°C or warms it to 48°C, with each side of the bed set to its own temperature.
Cools your mattress to 12°C or warms it to 48°C, one side at a time.
- Cools to 12°C for hot nights and night sweats
- Warms to 48°C so winter beds are cosy from the start
- Two zones, so you each sleep at your own temperature
350,000+ customers choose Pulsio
Thermasleep
Cools your existing mattress to 12°C or warms it to 48°C.
Or 3 interest-free instalments of
217,00 €
Limited stock available
How would you like to heat or cool your bed?
Full Bed comes in Double and King. For a Super King, choose Both Sides or One Side.
Try it for 60 days. Full refund if it's not for you.
- 01Cools to 12°C, warms to 48°CSet the exact temperature you sleep best at.
- 02Your side, their sideEach Pod runs its own half of the bed.
- 03Keeps your mattressFits over it like a fitted sheet. Double, King or Super King.
- 04Quiet, water-powered comfortNo fans blowing, no wires under you.
What's in the box
Both Sides, for two people who each want their own temperature: 2 Thermasleep Pods (temperature regulator units), 1 Thermasheet Both Sides mattress topper, 1 Thermasleep controller, 1 user manual.
One Side, for one person heating or cooling one side (half) of the bed: 1 Thermasleep Pod, 1 Thermasheet Dual-Zone mattress topper, 1 Thermasleep controller, 1 user manual.
Full Bed, for solo sleepers who want one temperature across the whole bed: 1 Thermasleep Pod, 1 Thermasheet Solo Full Bed mattress topper, 1 Thermasleep controller, 1 user manual.
Delivery & Warranty
Delivery
Our products are sent from our Ireland Hub via DHL Express or GLS with a delivery time of 2-5 days to Europe. Since our items are located within the EU you can rest assured no hold ups at the border and no extra taxes or duties.
Warranty
Every Pulsio product comes with a 1-year manufacturer's warranty, activated automatically when you buy. In the unlikely event of a fault, our customer service team will promptly arrange a replacement or exchange.
60-day guarantee
We stand behind every purchase with our hassle-free return policy. Our 60-day trial lets you try Thermasleep with a money-back guarantee.
If for any reason you're not completely satisfied, simply return it within 60 days for a full refund, no questions asked.
Specifications
Temperature range: cools to 12°C / 53°F, heats to 48°C / 118°F
Water capacity: 1400 ml
Pod dimensions: 28.5cm x 25cm x 21.5cm
Pod weight: 4.4kg
Safety: automatic power-off after 12 hours
Compatibility: any mattress (choose your Thermasleep size to match)
Energy use: single zone 0.6kW per 8 hours; dual zone 1.2kW per 8 hours
smart mattress cover
Meet Your
perfect sleep
Thermasleep is a smart, water‑powered mattress cover that lets you control the exact temperature of your bed. No new mattress needed.
Thermasleep is a smart, water‑pod mattress cover that lets you control the exact temperature of your bed
Powered by water
temperature range
12°C
-
48°C
Fits Any Bed
Works with your Double, King or Super King mattress you already love.
Zero Compromise on Comfort
Just like a fitted sheet, you will barely feel, hear, or notice it.
Powered by Water, Not Wires
Safe, low-EMF comfort with consistent heating and cooling.
Water-Powered Comfort
Microtubes Beneath the Surface
No Sacrifice on Comfort
Invisible tubes silently circulate temperature-regulated water without disrupting how your bed feels.
Maintain an even temperature across the mattress—without hot patches or chilly areas
Whisper-quiet
No air con or external noisy fans needed
Transform Your Existing Mattress
Thermasheet Mattress Cover
Perfect for your Double, King or Super King mattress.
Fits over your existing mattress
Fits any bed
Soft, breathable and invisible design
Cover with your regular bed sheet
Thermasleep Pod
Connects to your Thermasheet to deliver precise heating and cooling
Minimal compact design
Backlit auto off screen for nighttime operation
Whisper-quiet
Transform Your Existing Mattress
The Thermasleep is not a mattress. It transforms the one you already have.
sleep smarter
Save On Energy.
Sleep All Night.
Save On Energy.
Sleep All Night.
Heat or cool your bed, not your house
Keep your duvet all year round
No noisy fan or bed heater needed
cool paradise
all night
16°C
A Smarter Mattress Cover
Where Perfect Sleep Begins
Dual-Zone Option
Control the temperature across each side of the bed independently
Whisper-Quiet
Ultra quiet operation
Manual Control
Simplistic and seamless temperature adjustment
Fits Any Mattress
Seamlessly fits on top of your bed
Cool in summer, warm in winter
Year-round comfort with precise temperature control, to the nearest 1°
Year-round comfort, adapting to both your body, and the seasons.
Compact. Quiet.
Made to Fit.
The Pod’s compact size fits neatly under or beside your bed, blending effortlessly into any space.
Compact. Quiet.
Made to Fit.
The Pod’s compact size fits neatly under or beside your bed, blending effortlessly into any space.
Small & Compact
Small & Compact Design
Discreet design that fits any bedroom, right next to your bed
Fast Cooling & Heating
Cooling or Heating in 30 Minutes
Reach your ideal sleep tempurature in just 30 minutes
Whisper-Quiet
Whisper-Quiet, at just 47 dB
Operates at just 47 dB for peaceful, uninterrupted sleep
temperature set
18°
16°
What's Included.
ALL MODELS INCLUDE
Thermasheet mattress cover
Thermasleep Pod
x1 for One Side/ Full Bed
x2 for Both Sides
Remote Controller
User Manual
1 Year Warranty Certificate
How would you like to heat or cool your bed?
Both Sides
2 Pods
For couples who want a superior temperature-controlled sleeping experience by individually controlling each bedside.
Most Popular
Both Sides
2 Pods
For couples who want a superior temperature-controlled sleeping experience by individually controlling each bedside.
Most Popular
Full Bed
1 Pod
For solo sleepers, one temperature across the entire bed.
Full Bed
1 Pod
For solo sleepers, one temperature across the entire bed.
One Side
1 Pod
For couples who want temperature control for only one bedside.
One Side
1 Pod
For couples who want temperature control for only one bedside.
Select Your Bed Size
Double
King
Super King
Pre-order item: dispatch from 13 November
Better By Design
How We Compare
Thermasleep delivers precise, even temperature using safe, natural water flow.
Unlike traditional heating pads or electric blankets, Thermasleep delivers precise, even temperature using safe, natural water flow. No hotspots, no dry air, no overheating.
Thermasleep
Sleep at the perfect temp every night
As low as 12°C - you wake up refreshed
As high as 48°C and you don’t need to buy anything else
Precisely control temperature for each side of the bed
Temperature is set by you (and your partner)
Your
“Cooling Mattress”
Sleeping temperature fluctuates all night
Claims to offer “cooling power”, but you wake up sweating
Requires a heavy duvet or electric blanket
Temperature is the same across the entire bed
Temperature is dictated by your environment
Update
Find your Thermasleep
Who sleeps in your bed?
Find your Thermasleep
Do you want the whole bed one temperature, or just your side?
Find your Thermasleep
Do you both like the same temperature at night?
We recommend
Bed size
Full Bed comes in Double and King. For a Super King, choose Both Sides or One Side.
Other options