Great all around
RVMattress.comSignature Hybrid
- Hybrid
- 13.25 in thick
- Soft / Medium / Firm
Sleep Foundation: Best Mattress Overall Read review
$1,865RV King - 72x80 · list priceSee price
Fleetwood Frontier 39B mattress size
Main bed72 × 80 inRV king
That's an RV king, 4 in narrower than a regular king (76 × 80 in). A regular king won't fit, so get an RV king in exactly 72 × 80 in.
About the RV king size →Fleetwood spec sheet, 2027.
Bunks28 × 73 in
Bunk. Fleetwood spec sheet, 2027.
Common RV bunk sizes →
Mattresses in 72 × 80 in
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Best value
RVMattress.comCopperFlex Essential
- All-foam
- 6 in thick
- five comfort options
$799RV King - 72x80 · list priceSee price
Firm
RVMattress.comPlank Firm
- All-foam
- 10 in thick
- Firm / Extra Firm
Mattress Clarity: Best RV Mattress for Heavy People Read review
$1,532RV King - 72x80 · 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
$2,465RV King - 72x80 · list priceSee price
Heavy duty
RVMattress.comTitan Plus Luxe
- Hybrid
- 13 in thick
- Plush
$1,865RV King - 72x80 · list priceSee price
Helix pick
HelixHelix Midnight
- Hybrid
- 11.5 in thick
- Medium Feel
Sleep Foundation: Best Mattress for Side Sleepers Read review
$1,489RV King · list priceSee price
RV hybrid
RVMattress.comCopperFlex RV Hybrid
- Hybrid
- 10 in thick
- Medium-Firm
$1,065RV King 72x80 · list priceSee price
Custom size
Mattress InsiderLuxury Gel Memory Foam
- Memory foam
- 8 in thick
- not stated
Made to 72 × 80 inGet a quote
Bunk mattresses in 28 × 73 in
Some bunks have a rounded corner, so trace yours before a custom cut. A thicker bunk mattress takes headroom from the bunk above.
Custom size
Mattress InsiderLuxury Gel Memory Foam
- Memory foam
- 8 in thick
- not stated
Made to 28 × 73 inGet a quote
The Frontier bedroom. Measure the platform, not the old mattress, before you buy.
The 39B floorplan
Fleetwood's 2027 39B floorplan.
Is this your 39B?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2027 | Frontier 39B | 40' 1" | – |
Other Frontier mattress sizes
Sources
- Fleetwood (fleetwoodrv.com): https://www.fleetwoodrv.com/wp-content/uploads/2026/05/Frontier_SalesSheets_MY27.pdf
Questions
What size mattress is in the Fleetwood Frontier 39B?
The main bed is 72 × 80 in (Fleetwood spec sheet, 2027).
What size are the Fleetwood Frontier 39B bunk mattresses?
28 × 73 in (Fleetwood spec sheet, 2027).