PACKED SIZE
FlatCore Hybrid Support Mattress for Toyota Sienna
Need help with installation? Watch the video for the selected option.
We made FlatCore for Sienna owners who want their everyday van to be a comfortable place to spend the night. Its shaped base supports the cabin’s changes in height, with foam cushioning and adjustable air for road-trip stops and weekends away.
A flatter bed without a platform: Integrated air support helps smooth the transitions beneath the mattress.
Room to settle in: A sleeping surface over six feet long gives you space to stretch out after a day on the road.
Comfort you can adjust: Foam cushions your shoulders and hips, while air pressure lets you choose your firmness.
About a minute to inflate: The built-in rechargeable pump handles inflation and helps remove air for packing.
Ready for everyday life again: Roll it into the included carry bag when it’s time to make room for passengers, groceries and the next school run.
Turn the Sienna Into a Family Basecamp
FlatCore Hybrid Support Mattress for Toyota Sienna
Sale price$499.00
Regular price$599.00
Core Design Details
Key Features
A Flatter Surface Across the Long Cabin
Built-In Pump Ready in 60 Seconds
7.5 Inches of Air-and-Foam Support
Soft-Touch TPU Without the Pool-Float Feel
Packs Away for Everyday Family Life
Size On
INFLATE TIME
60 Seconds
Specifications
- Fit
- Toyota Sienna
- Mattress size
- 74.8" x 55.1" x 7.5" / 1900 x 1400 x 190 mm
- Weight
- 10.3 lb / 4.65 kg
- Storage size
- 26.4" x Ø16.9" / 670 x Ø430 mm
- Inflation time
- About 60 seconds
- Pump
- Built-in rechargeable inflate / deflate pump
A Better Bed Without Turning the Sienna Into a Build Project
Tent - 35 min average setup More time to pack wet
Traditional camp setups add steps before you can rest.
FlatCore keeps sleep simple: unroll the mattress, settle into soft foam support, and get comfortable faster.
FlatCore keeps sleep simple: unroll the mattress, settle into soft foam support, and get comfortable faster.
Camper shell - permanent mod Resale value drops
Permanent mods are hard to undo.
FlatCore keeps your vehicle flexible while adding a foam-top layer that feels softer and more stable than sleeping on air alone.
FlatCore keeps your vehicle flexible while adding a foam-top layer that feels softer and more stable than sleeping on air alone.
Roof top tent - $1,500 and up Plus rack and install
Roof top tents add cost, hardware, and permanent bulk.
FlatCore gives you a cushioned foam sleep surface without turning your vehicle into a build project.
FlatCore gives you a cushioned foam sleep surface without turning your vehicle into a build project.
Air Mattress
Havnby Mattress
Setup time
10-15 min with pump
Unroll, under 120 sec
Soft & supportive comfort
Holds shape overnight
Slow leaks are common
Built-in pump
Insulation from cold floor
What real owners are saying
Ali
2025 Toyota RAV4 XLE Owner
"Setup took two minutes, pump included, module charges over USB-C. Fit the RAV4 perfectly with no platform needed, and slept two of us by the lake like a real mattress."
David L.
2022 Toyota RAV4 Owner
"Took the whole family camping in the RAV4 for the first time. Kids were asleep before we finished making dinner, and nobody complained about the ground once."
Jordan M.
2023 Tesla Model Y Owner
"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."
Mike B.
2020 Ford F-150 Owner
"Twelve hour shifts two hours from any job site. Now I lay the seats down, sleep in the truck, and I am back at it in the morning without the drive home."
Ingrid S.
2024 Model 3 Owner
"Drove through Jotunheimen after a week with no plans. The fit was exact, and the material held up through four nights without any issues."
Life with Havnby
FAQ
Is FlatCore made specifically for the Toyota Sienna?
Yes. FlatCore is shaped for a prepared Toyota Sienna cabin. Confirm your model year and seating layout against the fit guide before ordering.
How does FlatCore make the sleep surface flatter?
The shaped air base adds support where the prepared cabin floor changes height, helping compensate for transitions that a generic mattress simply follows.
How long does setup take?
The built-in rechargeable pump inflates the mattress in about 60 seconds and powers deflation in about 70 seconds.
How does shipping work?
Havnby ships from warehouses in California, New Jersey, Sydney, Toronto, and Frankfurt. Most in-stock products ship free to the contiguous U.S., most of Canada, Australia, New Zealand, and Europe in 5-8 business days. Hawaii, Alaska, and items not stocked locally ship from Asia in 7-14 business days and may require a shipping fee.
How does the 60-day sleep trial work?
Most new Havnby mattresses include a 60-day sleep trial from delivery. Return eligibility, shipping costs, and condition requirements follow the current Havnby return policy.