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
Forest River Cedar Creek 39RKB 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 →Forest River spec sheet, 2026.
Mattresses in 72 × 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
$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
Is this your 39RKB?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2025 | Cedar Creek 39RKB | 43' 3" | 8 |
| 2026 | Cedar Creek 39RKB | 43' 3" | – |
| 2027 | Cedar Creek 39RKB | 43' 3" | 8 |
Other Cedar Creek mattress sizes
Sources
- campersinn.com: https://www.campersinn.com/product/new-2027-forest-river-rv-cedar-creek-39rkb-3728301-5
- recreationalvehicles.info: https://recreationalvehicles.info/2026-forest-river-cedar-creek/2026-forest-river-cedar-creek-brochure-page-003.jpg
- bishs.com: https://www.bishs.com/product/used-2025-forest-river-rv-cedar-creek-experience-39rkb-3794097-5
Questions
What size mattress is in the Forest River Cedar Creek 39RKB?
The main bed is 72 × 80 in (Forest River spec sheet, 2026).