A woman sleeping on the temperature-regulating sleep layer

Made In Japan ✿

Introducing The

ClimaShift™ Cooling Sleep Overlay

Designed for women facing menopause night sweats & hot flashes.

Originally developed to offset hot, humid summer nights, this sleep overlay uses integrated Phase Change Material (PCM) to help regulate your body temperature and moisture levels so you can stay asleep longer and wake up more refreshed.

Helps reduce overheating

Regulates temperature naturally

No power, no noise, no upkeep

Soft, breathable & machine washable

Next Order Batch: August 2026 · Imported in small batches

£90 incl VAT and Shipping

Reserve Yours Today

Made in Japan

Adheres to strict Japanese quality control standards.

Limited batches

Imported directly and curated in small quantities.

No hassle to buy

We take care of importing, customs and shipping.

Real People

We are a family owned business, not a faceless marketplace reseller.

Does this look familiar?

You wake up at 3 a.m. overheated

You can't get back to sleep

You're uncomfortable, damp and sticky

You feel exhausted the next day

You're not alone. Menopause can make your body temperature unpredictable. This sleep layer is designed to regulate those moments through the night.

Why Japan?

Decades of innovation, designed for extreme heat and humidity.

Japan's hot, humid summers have driven bedding innovation for decades. Our cooling sleep overlay is the result of that expertise and applied to help women facing perimenopause challenges.

Engineered for body heat and humidity
Meets Japans strict Q-max standards (JIS L 1927)
Plant-derived PCMs for precise temp control
Non-toxic, allergy free and odorless
Natural woven fibers to absorb moisture

How It Works

Smart temperature regulation with PCM

Our ClimaShift™ Cooling Sleep Overlay uses Phase Change Material (PCM) that absorbs excess body heat when you get too warm, and releases it when you cool down. It is engineered with a melting activation/reaction temperature between 28°C to 33°C. While your core body temperature is around 37°C, your skin surface temperature typically rests between 31°C and 35°C. By setting the PCM transition point just below skin temperature, the pad begins absorbing heat the exact second you lie down. The sweet spot for comfortable sleep is a microclimate (the pocket of air between your skin and the blanket) of 31°C to 33°C with low humidity. The PCM actively melts to soak up spike heat whenever your skin microclimate tries to push past this comfortable limit.

1. Body Heat Absorbed

When your body temperature rises, PCM overlay absorbs the excess heat.

2. Heat Gets Dispersed

PCM changes physical state to diffuse and store the heat.

3. Temperature Stabalised

As your body cools, PCM stays at an equilibrium temperature to quell spikes.

The result: fewer night wakings, more consistent comfort, and deeper, more restorative sleep.

Not all cooling is the same

Cheap marketplace pads fade fast. Active-powered smart cooling systems cost thousands and need maintenance. Here's the middle ground.

	Cheap Marketplace Pads	PCM Cooling Sleep Layer	Active-Powered Bed Cooling Systems
Price point	£	££	££££+
Effective Cooling	✗ 15-30 mins	✓ 4-6 hours	✓ 8+ hours
Power required	✓ None	✓ None	✗ Mains powered
Noise	✓ Silent	✓ Silent	✗ Pump / compressor noise
Maintenance	✗ Degrades in Wash	✓ Machine wash	✗ Subscription & maintenance
Meet Japan Q-Max Standards	✗	✓	--
Longevity	✗ Sprayed coating fades	✓ PCM embedded fill	✗ Replace electronic parts

Close-up of the sleep layer fabric and label

Premium by Design

Every detail, considered

Breathable & lightweight for all-night comfort
Silky-soft, quiet fabric that doesn't crinkle
Secure elastic straps keep it in place
Durable and machine washable
Made in Japan with meticulous quality control

John, founder of The Japan Sleep Company

Our story

We didn't set out to start a company. We just wanted to get some sleep.

After my wife turned 47, she started experiencing hot flashes and night sweats that disrupted her sleep. We tried lots of things but nothing seemed to truly help.

The answer turned up somewhere I wasn't looking. While working in Japan, I saw a mattress cover made for the hot and humid summer nights there. It was used to manage body heat and moisture, not simply cover up the mattress.

I got one for my wife. She slept better. That was the beginning of a journey to create better sleep products for ourselves and others going through this stage of life.

— John and Lindsey, Founders

And it wasn't just us suffering

84%

named trouble sleeping as the symptom that held them back most at work

77%

found at least one symptom very difficult to live with

45%

had not raised their symptoms with their GP

Fawcett Society, Menopause and the Workplace, 2022. Survey of 4,014 women in the UK.

Is this right for you?

It's a good fit if

You experience night sweats or hot flashes
You need a sleep layer with moisture wicking materials
You want high-quality that can be washed and lasts
You're happy to wait for a trusted import from Japan

It's probably not if

You expect the sleep layer to cure menopause symptoms
You want an actively powered cooling mattress
You want the cheapest pad available
You'd rather buy from an unknown seller via a marketplace

Next Import Batch

Reserve Your ClimaShift™ Cooling Sleep Overlay

Next Order Batch: August 2026. Imported in limited batches.

Full Price

£90^{incl. VAT & shipping}

Secure yours today with a £30 refundable deposit
Remaining balance due once shipment leaves Japan
Ships direct to your home address in 7-10 days
We take care of VAT, customs and duties
30-day hassle-free returns