Why does body temperature affect sleep quality?

Your core body temperature naturally drops 1–2°C at sleep onset. Bedding that accelerates this drop signals the brain to enter deep, restorative sleep stages faster.

What is thermoregulation during sleep?

Thermoregulation is your body's ability to maintain its core temperature. During sleep, your body needs to dissipate heat through the skin to initiate and maintain deep sleep cycles.

What is Q-Max cooling?

Q-Max (Qmax) is a scientific measure of the instant cool-to-touch sensation of a fabric. Higher Q-Max values mean a greater, faster cooling sensation on skin contact. The Sleep Lab's CoolTouch® fabric features a Q-Max rating of 0.38 verified by independent textile laboratories.

Does sleep temperature affect athletic recovery?

Significantly. Cooler sleep temperatures have been shown to increase HGH (Human Growth Hormone) secretion during deep sleep, which directly drives muscle repair, tissue regeneration, and performance recovery.

What is the ideal temperature for sleep?

Research suggests the optimal bedroom temperature for sleep is 15–19°C, with the sleep surface playing a critical role in regulating skin temperature throughout the night.

What is phase-change material in bedding?

Phase-change materials (PCMs) are substances that absorb and release thermal energy during the process of changing between solid and liquid states. In CoolTouch® fabric, micro-encapsulated PCMs absorb excess body heat at the sleep surface, preventing overheating.

No more kicking off the covers at 2am.

Cool.
By design.

A performance fabric system engineered for your body's ideal sleep temperature.

CoolTouch® pulls heat out of your bed so your body can repair.

Explore the Science

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Why CoolTouch® Exists

Built on the Science of Sleep Temperature

Heat builds up around your body at night; trapping moisture and fragmenting deep sleep. That's why we developed CoolTouch®; clinical-grade cooling engineered to support deeper, more restorative sleep.

~1°C

the core temperature drop required to initiate sleep

Kräuchi et al., Nature (1999)

+36%

more deep slow-wave sleep in a cool sleep environment

Haskell et al., Sleep Research

2×

faster sleep onset with a cooled sleep surface

Raymann & Van Someren, Sleep (2008)

One Mission, Every Product

Sleep, optimised. In every detail.

Every layer, fill and fabric is designed with one purpose: better sleep; led by our proprietary CoolTouch^® technology.

01 / 04

01 Our Proprietary Technology

CoolTouch^®

Phase-Change Fabric System

Cooling · Regulation

Phase-change yarn absorbs heat when you run warm and releases it as you cool, holding your sleep zone at deep-sleep temperature.

Shop CoolTouch® Products

CloudFill^®

Adaptive Comfort Fill

Airflow

Airflow channels through a lofty microfiber fill; soft, breathable comfort that never traps heat.

Powers the CoolCloud® Pillow

GLACIO^®

Mineral Cooling Platform

Mineral Cooling

Mineral cooling that never washes out; the open-cell latex dissipates heat all night.

Powers the GLACIO® Latex + Cell Pillow

CoolGel^®

Gel-Infused Support Core

Support · Cooling

Cooling gel marbled through memory foam pulls heat away while contouring support keeps your spine aligned.

Powers the GLACIO® CoolGel® Memory + Cell Pillow

The Plan

Heat builds. CoolTouch® handles it.

The same sequence every night: heat builds, CoolTouch® pulls it away, and your sleep zone stays in the deep-sleep range.

Step 1Active

Body Heat Generated

Your skin radiates heat during sleep

Step 2

CoolTouch® Dissipates Heat

Step 3

Airflow Disperses

Step 4

Moisture Wicked Away

Step 5

Stable Sleep Zone

Standard Bedding

Temperature rise72%

Moisture retention80%

Airflow20%

CoolTouch® System

Temperature rise18%

Moisture retention12%

Airflow98%

Illustrative comparison of typical bedding behaviour; not laboratory measurements.

Material Architecture

Inside CoolTouch^®

Tap any layer to explore how each component contributes to optimal sleep temperature.

Skin Surface ↑↓ Base

Close-up of CoolTouch® fabric surface texture

Layer Detail

Ultra-Fine Cooling Fiber Architecture

CoolTouch® Performance Fabric is built from ultra-fine multi-filament yarns engineered to maximize surface area and thermal exchange.

The result: heat transfers away from the body more efficiently than conventional fabrics, with a soft, silk-like feel and no heat accumulation overnight.

Ultra-fine multi-filament construction
Fibers up to 75× finer than human hair
Increased surface area for heat transfer

Fibers 75× finer than human hair

Clinical Outcomes

The science, at a glance

Peer-reviewed research, distilled into the numbers that matter.

+36%

More Deep Sleep

N3 slow-wave sleep; the most physically restorative stage

Haskell et al., Sleep Research Journal ↗

+30%

Athletic Recovery

Greater overnight muscle recovery vs. warm sleepers

Journal of Strength & Conditioning Research ↗

+25%

Cognitive Performance

Better memory consolidation & reaction time next day

Walker, M. "Why We Sleep" (2017) ↗

1–2°C

Core Temp Drop Triggers Sleep

Your body must cool by 1–2°C to initiate sleep onset; a biological necessity

Van Someren, Sleep Disorders & Research (2006) ↗

2×

Faster Sleep Onset

Kräuchi et al., Nature (1999) ↗

↑ HRV

Heart Recovery

Kräuchi et al., Journal of Sleep Research ↗

18–19°C

Optimal Sleep Temperature

Research-backed ambient range for unbroken deep sleep throughout the night

National Sleep Foundation & Sleep Medicine Reviews ↗

70%

Growth Hormone

Van Cauter et al., JAMA (2000) ↗

All statistics sourced from independent peer-reviewed research. Individual results may vary.

The Sleep Lab™

Feel the difference tonight.

Every layer engineered to help you sleep deeper.

Improve your sleep score

Products engineered around peer-reviewed thermoregulation research.

In Action

The technology, up close.

Cooling Activation

CoolTouch® fibres draw heat away on contact, keeping the surface cooler all night.

HydroWick® Moisture Transport

Hydrophilic fibers draw moisture away from the skin, keeping the surface dry.

Breathable Core

Hundreds of ventilation channels keep air moving through the foam core, preventing heat buildup.

Silver Ion Treatment

Silver-ion threads inhibit bacterial growth at a molecular level; no harsh chemicals.

Thermal Transfer

Surface cooling, moisture wicking and airflow combine to maintain your body's ideal thermal equilibrium.

The Temperature Curve

Sleep begins with cooling

Sleep begins with a natural drop in core body temperature. When your bedroom is too warm, that process is disrupted; reducing sleep quality and recovery.

Core Body Temperature During Sleep

Drop from baseline waking temperature (°C)

10 PM → 7 AM

0°C-0.9°C-1.8°C

Deep Sleep window

REM window

Minimum drop required for sleep onset

Too Warm

> 20°C room

Blocks the core temp drop
Up to 40% less deep sleep

Optimal

18–19°C room

Supports the natural core temp drop
Faster sleep onset; peak recovery

Too Cold

< 16°C room

Triggers vasoconstriction
Fragmented sleep cycles

CoolTouch® actively recreates this optimal thermal window

By drawing excess heat away from the sleep surface and maintaining a -3.2°C cooler microclimate, CoolTouch® creates the thermal conditions your body needs for its natural temperature-drop cycle.

Recovery Science

Sleep is when muscles are built

Exercise breaks muscle fibres down. Sleep rebuilds them; and temperature is the primary lever.

🔬 Protein Synthesis

Growth hormone during deep sleep amplifies MPS by up to 60%.

⚡

Stage 1Micro-tear Damage

Microscopic tears along muscle fibres trigger the repair cascade necessary for growth.

🔥

Stage 2Inflammatory Response

Immune cells flood the damaged site, clearing debris and scaffolding new muscle construction.

🔬

Stage 3Protein Synthesis

Muscle Protein Synthesis accelerates as amino acids are woven into new and existing muscle fibres.

💪

Stage 4Remodelling & Growth

Repaired fibres are denser than before, resulting in measurable hypertrophy and force gains.

Why temperature matters for recovery

70%

of daily total

Growth Hormone released during deep sleep

+60%

vs sleep-deprived

MPS rate increase with adequate sleep

32%

less catabolic stress

Cortisol reduction with cool sleeping environment

1.4×

vs overheated sleepers

Faster muscle recovery with optimal sleep temp

"Approximately 70% of daily growth hormone is secreted during slow-wave sleep; without it, the anabolic window for muscle repair closes."

Van Cauter et al., Journal of Sleep Research

Technology Glossary

Key Definitions, Data & FAQs

Every technology term, Q-Max score and science FAQ; fully sourced.

View Glossary →

Validated By Science

Sleep, quantified.

Every design decision is grounded in peer-reviewed thermoregulation research. What that means: you fall asleep faster, spend more of the night in deep sleep, and wake up recovered.

18–19°C

Studied Optimal Sleep Temp

†

+30%

Better Recovery

‡

2× faster

Sleep Onset

+36%

More Deep Sleep

* Ambient temperature range associated with restorative sleep in sleep hygiene research. † Journal of Strength & Conditioning Research; Halson (2014). ‡ Kräuchi et al., Nature (1999). § Haskell et al., Sleep Research Journal.