Couples
Sleep in perfect sync
Dual-zone control keeps each person at their own ideal temperature — no more thermostat standoffs, just better rest together.
Built for deep sleep.
Personalized to you.
A smart mattress built for deeper recovery
Dual-zone cooling and heating, continuous sleep sensing, and an intelligence that learns your nights — the Smart Mattress reshapes every layer of how you sleep.
Made for every sleeper
Whatever your sleep challenge, the Core meets you there
The Core adapts to every kind of sleeper, building the exact conditions for real, restorative rest.
Menopausal women
Relief from hot flashes, every night
Your side stays cool through the night to help prevent overheating. When a hot flash hits, one tap cools you fast, then eases back to normal.
Wellness seekers
Optimize every night
Continuous tracking of heart rate, HRV, and temperature turns your sleep into insights you can act on for recovery, focus, and longevity.
Hot sleepers
Finally sleep through the heat
The Core cools your side before you overheat and holds your temperature steady, so you stay asleep instead of flipping the pillow.
Everyday athletes
Recover after training
Your body repairs as you sleep. The Core cools you to ease strain and tracks recovery, so you wake up genuinely restored — not just rested.
Snorers
Less snoring, more sleep
When snoring is detected, the Core gently raises your upper body to help keep your airway open — no elbows, no waking each other.
The best sleep you've ever had
The Core is clinically shown to deliver real results for your sleep, night after night.
Up to
44%
less time to fall asleep
Up to
34%
more deep sleep
Up to
45%
reduction in snoring
Up to
23%
fewer night wake-ups
Why Slumber 8
Driven by ambition.
Driven by ambition.
Proven by science.
We're obsessed with sleep fitness — grounded in research, powered by data, and backed by dozens of clinical studies. The goal is simple: optimal rest for peak health and performance. Because sleep is your edge.
Why Slumber 8
Real people. Real results.
How the Core changes sleep
How the Core helps people sleep deeper, feel better, and get more out of every single day.
Daniel
Critical care physician
"Within three weeks I saw real jumps in my REM and deep sleep."
Mei Lin
New mom & finance lead
"Through pregnancy it was everything to dial in the exact temperature."
Wei & Lin
Nurse & designer
"I get my cool side, she gets her warm side — and we both finally sleep."
Elena
Founder & triathlete
"The Core has been a huge asset to my work, my training, and my recovery."
Arjun
Software engineer
"No more waking up drenched in sweat or freezing at 3am. It just holds."
Thousands of trusted reviews from people like you
As seen in
A new standard for sleep
THE LEDGERNORTHWINDVitalisQUANTAThe AtlasOUTPACE
Press names are placeholders — replace with real outlets.