OUR ETHOS
Redefine Car Sleeping
Every mile deserves a real night's rest.
Car sleeping is not a backup plan. It is the plan. Some of the best nights have no address, no reservation, no itinerary. Just you, the dark, and wherever the road dropped you. Havnby mattresses are cut to fit your exact vehicle, so every pullout, every trailhead, every middle-of-nowhere becomes a place worth staying. Sleep well. Go further.
Discover FlatCore Technology
FlatCore levels uneven folded seats into a real sleep surface, without plywood, loose pumps, or bulky storage.
Available for Model Y, RAV 4, CR-V and more.
Built-in Pump
7.5" High-desity Foam
Performance TPU Material
Auto-Level Design
0°
Level Sleep Surface
FlatCore helps turn sloped folded seats into a level sleep surface, correcting vehicle-seat angles that can reach up to 12°.
7.5"
Sleep Like Home
High-density foam that never bottoms out. No air-mattress sag, no camping-pad flimsiness. Just the deep, supported sleep you get in your own bed.
80s
Ready to Rest
The built in brushless pump inflates FlatCore in 80 seconds. No loose pump. No slow setup. Just park, inflate, and rest.
Our Every Step
First Launch: Mattress 1.0
Introducing our first car mattress
Three foam panels, one removable cover, designed to fit Tesla vehicles and most SUVs. Simple, purposeful, and the start of everything.
Smarter Storage: Mattress 2.0
Nine pieces. Easier to pack, easier to carry.
The first version worked, it just didn't store well. Breaking it into nine modular pieces solved that without touching the comfort.
Roll-Compressed: Mattress 3.0
What if you could roll the whole thing up and go?
Two pieces, vacuum-compressed, ready in minutes. Unroll it and the foam comes back to full shape almost immediately.
Beyond the Mattress: First Electronics
We got curious about the rest of the car.
Our first in-car fridge was a bet on something bigger. Car living, not just car sleeping.
Air-Compressed Foam: Mattress 4.0
Real foam comfort. Small enough to actually travel with.
A built-in pump handles the compression. You unpack, inflate slightly, and the foam does the rest.
FlatCore Tech: Mattress 5.0
Folded rear seats are almost never flat. We solved it.
Adjustable air chambers in the base compensate for the slope. The surface sits level, and so does your sleep.
Out there with Havnby
"Most truck bed stuff I've tried needs cutting or shimming to fit right. This one didn't, it laid flat on the first try, held up through a full elk camp weekend."
"Did a solo loop through Zion and Bryce in October. The fit was exact and the material held up through four nights without any issues."
"Honestly didn't think a CR-V had enough room to make this work. Setup took maybe five minutes and we had a real comfortable night's sleep."
"Fits the load floor perfectly, no gaps, no sliding. Woke up in the Sierras on Sunday feeling more rested than I expected from a car."
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