Great all around
RVMattress.comSignature Hybrid
- Hybrid
- 13.25 in thick
- Soft / Medium / Firm
Sleep Foundation: Best Mattress Overall Read review
$1,465Olympic Queen - 66x80 · list priceSee price
Winnebago Thrive 18FBS mattress size
Main bed66 × 80 inOlympic queen
That's an Olympic queen, 6 in wider than a regular queen. RV mattress sellers stock it; a regular queen would leave 6 in of platform bare.
Winnebago spec page, 2027.
Mattresses in 66 × 80 in
We may earn a commission when you buy through some of these links. It doesn't change which mattresses we list.
Best value
RVMattress.comCopperFlex Essential
- All-foam
- 6 in thick
- five comfort options
$799Olympic Queen - 66x80 · list priceSee price
Firm
RVMattress.comPlank Firm Luxe
- Hybrid
- 13 in thick
- Firm / Extra Firm
$1,865Olympic Queen - 66x80 · list priceSee price
Cooling
RVMattress.comAurora Luxe Cooling
- Hybrid
- 13.25 in thick
- Soft / Medium / Firm
Sleep Foundation: Best Mattress for Temperature Regulation Read review
$1,999Olympic Queen - 66x80 · list priceSee price
RV hybrid
RVMattress.comCopperFlex RV Hybrid
- Hybrid
- 10 in thick
- Medium-Firm
$799Olympic Queen - 66x80 · list priceSee price
Custom size
Mattress InsiderLuxury Gel Memory Foam
- Memory foam
- 8 in thick
- not stated
Made to 66 × 80 inGet a quote
The Thrive bedroom. Measure the platform, not the old mattress, before you buy.
Bed sizes by year
| Year | Main bed | Bunks | Other beds | Source |
|---|---|---|---|---|
| 2026 | 66 × 80 in Queen | – | – | Winnebago spec page |
| 2026 | 66 × 80 in Queen | – | – | Winnebago spec sheet |
| 2027 | 66 × 80 in Queen | – | – | Winnebago spec page |
Years not listed weren't published.
The 18FBS floorplan
Winnebago's 2026 18FBS floorplan.
Is this your 18FBS?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2026 | Thrive 18FBS | 22'11" | 3 |
| 2027 | Thrive 18FBS | 22 ft 11 in | 3 |
Other Thrive mattress sizes
Sources
- bishs.com: https://www.bishs.com/product/new-2027-winnebago-thrive-18fbs-3824908-29
- Winnebago (winnebago.com): https://www.winnebago.com/models/product/specifications/2026-thrive
- Winnebago (winnebago.com): https://www.winnebago.com/Files/Images/Winnebago/Products/2026/Thrive/18FBS-Floorplan-Page/Thrive-18FBS-26-T%20%281%29.png
Questions
What size mattress is in the Winnebago Thrive 18FBS?
The main bed is 66 × 80 in (Winnebago spec page, 2027).