The cube
A small cube of salt-based gel in a thin silicone skin. No plastic wrapper. It melts at about 26 °C, which is cooler than your skin.
Waitlist test · Nothing is charged
A cooler pillow, with no power and no fridge.
Small salt-gel cubes that melt at about 26 °C. Melting uses heat, and that heat comes from your head. The cubes sit in a quilted sleeve inside your pillowcase. No plastic wrapper, no cables, no fridge.
Reserve a place. Nothing is charged. We write to you when the first kits are ready, and you decide then.
- No power and no fridge
- Many small cubes, not one big pad
- Planned price shown below
What it is
Cubes, a sleeve, and your own pillow
The sleeve
A quilted cotton sleeve with one pocket per cube, so the cubes stay in place. The sleeve goes inside your normal pillowcase.
The kit
50 or 100 cubes, one sleeve, and a bag for spares. Use a few cubes for a light touch, or fill every pocket.
One pillow, many small cubes. If one cube fails, you change one cube, not the whole pad.
How it works
Why a cube that melts at 26 °C keeps a pillow cooler
The gel is a phase-change material, or PCM. Ice is a PCM at 0 °C. Ours works at about 26 °C, so it needs no freezer.
-
1
It starts solid
In a room cooler than 26 °C, the gel inside each cube is solid. Think of a very slow ice cube that sets on its own.
-
2
Your head warms it
Skin is about 33 °C. When your head rests on the pillow, heat flows from your head into the cubes.
-
3
It melts, and uses heat
Melting takes a lot of heat. While a cube melts, it stays at about 26 °C instead of warming up to the temperature of your head.
-
4
It sets again
When the room is cooler than 26 °C, the gel goes solid again. Turn the pillow over, or wait for the morning.
On the scale: Fridge, about 4 °C Cubes melt, about 26 °C Skin, about 33 °C
What we still have to test
- How many hours a full sleeve stays cool under a head, in a warm bedroom.
- How many nights a cube lasts before the gel starts to separate.
- The weight of a full sleeve, and how it feels under your head.
- The best cube size, and how many cubes one pillow needs.
We publish the numbers when we have measured them. Until then, we promise no hours and no degrees.
Who it is for
A good fit, and not a good fit
A good fit if
- You sleep hot, and the pillow is the first thing that gets warm.
- Your bedroom is warm in summer, and you want no fan or air conditioning at night.
- You sleep in the day after a night shift.
- You want a pad you can repair cube by cube, not throw away.
Not for
- Babies, small children, and anyone who cannot move a cube away from their face.
- Pet beds. A pet can bite a cube open.
- Anyone who needs to cool down for a medical reason. This is a comfort product, not a treatment. Ask a doctor.
- Use on bare skin for a long time, or on an injury. It is not a cold pack.
In the box
What is in the kit
Everything you need for one pillow. Nothing you need to plug in.
-
50 or 100 cubes
Salt-gel cubes in a silicone skin. The number you choose.
-
One quilted sleeve
Cotton, with one pocket per cube. It goes inside your pillowcase. Wash it with the cubes out.
-
A bag for spare cubes
Keep the cubes you do not use, and change a cube when you need to.
-
A care card
How to fill the sleeve, how to wash it, and what to do if a cube splits.
What is in a cube
Inside the skinWhat it does
- Water
- About half of the gel
- Sodium sulfate
- The salt that stores the heat. Also called Glauber’s salt
- Table salt
- Sets the melting point near 26 °C
- Borax, a small amount
- Helps the gel set again at the same temperature
- A thickener
- Keeps the water and the salt together
- The skin
- Silicone, the same family of material as baking moulds
Not final. We are still testing the exact mix, and the care card will list it.
Planned price
What it will cost, as planned today
A planned price. It may change. We show it so you can tell us if it feels fair.
Starter
A light touch, or a small pillow.
€69 planned
about €1.38 a cube
- 50 cubes
- One quilted sleeve
- A bag for spare cubes, and a care card
Full
Every pocket filled, with spares.
€119 planned
about €1.19 a cube
- 100 cubes
- One quilted sleeve
- A bag for spare cubes, and a care card
Nothing is charged now.
You are not buying anything today. Before any sale, you will see the final price, VAT, and delivery costs, and you decide then.
For comparison, in UK and EU shops: simple gel pillow mats cost about €10 to €30. A gel pad from a bedding brand costs about €40 to €75. A pillow with a PCM layer costs about €95 to €170. Bed cooling systems with a pump cost €500 and more.
Safety
Safe use, in plain words
Not for eating
The gel is salt, water, and a thickener. It is not food. If someone swallows some, give them water and call your local poison centre or a doctor.
Keep away from small children and pets
A child or a pet can bite a cube open. Keep the kit out of their reach. Never put it in a cot or a pet bed.
If a cube splits
- Take it out of the sleeve. Do not eat the gel or rub it in.
- Wipe the gel up with a wet cloth and wash your hands.
- If gel gets in your eyes, rinse them with water for a few minutes.
- Wash the sleeve and the pillowcase.
- Put the split cube in a bag, in the household waste.
Heat and cold
Do not put the cubes in an oven, a microwave, or a tumble dryer. Keep them away from heaters. They need no fridge and no freezer.
No medical claims. The cubes are for comfort. They do not treat or prevent heatstroke, fever, hot flushes, sleep problems, or any illness. If you feel ill in the heat, call a doctor.
Waitlist
Reserve a place
Leave your email, and we write when the first kits are ready. Nothing is charged, and you are not buying anything today.
- Nothing is charged
- First pick of the first kits
- Your answers shape the kit
- Leave any time
You are on the list.
Thank you.
We write when the first kits are ready. Nothing is charged, and you decide then.
Questions
Good to know
Is this a pre-order? Do I pay now?
No. You reserve a place on a list. Nothing is charged, and we have no card details. When the kits are ready, we email you, and you decide then.
Why cubes, and not one gel pad?
Three reasons. A pad that fails goes in the bin, but a cube that fails is one cube. You choose how many cubes go under your head. And many small cubes bend with the pillow.
What is a PCM?
A phase-change material. It melts and sets at a chosen temperature, It uses a lot of heat to melt, and gives that heat back when it sets. Ice is a PCM at 0 °C. Our gel is a PCM at about 26 °C.
How long does it stay cool?
We do not know yet, and we will not guess. We are measuring it now, under a head, in a warm room. We put the numbers on this page when we have them.
Does it need a fridge?
No. The cubes set again on their own when the room is cooler than about 26 °C. In a bedroom that stays warmer than that all night, they may not set, and we are testing that too.
What is the gel made of?
Water, sodium sulfate (Glauber’s salt), table salt, a small amount of borax, and a thickener. The skin is silicone. It is not food, and it should stay away from small children and pets. See Safety.
Where will you deliver?
We plan to start in the EU and the UK. Tell us your country when you reserve a place, so we know where to start.
What happens to my email?
We use it only to tell you about this product. We never sell or share it, and you can leave the list any time. See Privacy.
Why a working name?
Because this page is a test. We want to know if people want the kit before we choose a name, a logo, and a domain. The product gets its real name before launch.
Cool, simple, and easy to repair.
Reserve a place. Nothing is charged.