Top pick
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 Rockwood 8421DB 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 floorplan drawing, 2027.
Bunks (1)67 × 73 in
top bunk option. Forest River floorplan drawing, 2027.
Common RV bunk sizes →
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
Mattress InsiderThe Sedona
- All-foam
- 5.5 in thick
- Firm
$40372" x 80" · list priceSee price
Reviewers' favorite
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
Best memory foam
Mattress InsiderElation Gel Foam
- Memory foam
- 6 in thick
- cushion firm
$65972" x 80" · list priceSee price
Best hybrid
RVMattress.comCopperFlex RV Hybrid
- Hybrid
- 10 in thick
- Medium-Firm
$1,065RV King 72x80 · list priceSee price
Best all-foam
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
Reviewer 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
Reviewer pick
Mattress InsiderPark Meadow Encased Coil II
- Hybrid
- 8 in thick
- cushion-firm
Sleep Foundation: Best Mattress for Pressure Relief Read review
$84972" x 80" · list priceSee price
Bunk mattresses in 67 × 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 InsiderPark Meadow Encased Coil II
- Hybrid
- 8 in thick
- cushion-firm
Sleep Foundation: Best Mattress for Pressure Relief Read review
Made to 67 × 73 inGet a quote
The Rockwood bedroom. Measure the platform, not the old mattress, before you buy.
The 8421DB floorplan
Forest River's 2027 8421DB floorplan.
Is this your 8421DB?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2026 | Rockwood Signature 8421DB | 41' 10" | – |
| 2027 | Rockwood Signature 8421DB | 41' 10" | – |
Other Rockwood mattress sizes
Sources
- Forest River (forestriverinc.com): https://forestriverinc.com/rvs/rockwood-signature-travel-trailers/8421DB/14697
- Forest River (forestriverinc.com): https://forestriverinc.com/rvs/rockwood-signature-travel-trailers/8421DB/11721
Questions
What size mattress is in the Forest River Rockwood 8421DB?
The main bed is 72 × 80 in (Forest River floorplan drawing, 2027).
What size are the Forest River Rockwood 8421DB bunk mattresses?
67 × 73 in (Forest River floorplan drawing, 2027).