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 Berkshire 40F 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 →2026 Forest River Berkshire brochure, 2026.
Bunks (2)30 × 73 in
Bunk. 2026 Forest River Berkshire brochure, 2026.
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 30 × 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 30 × 73 inGet a quote
Bed sizes by year
| Year | Main bed | Bunks | Other beds | Source |
|---|---|---|---|---|
| 2021 | 72 × 80 in King | 30 × 73 in | – | 2021 Forest River Berkshire brochure |
| 2021 | – | 30 × 73 in | – | Forest River spec sheet |
| 2022 | 72 × 80 in King | 30 × 73 in | – | 2022 Forest River Berkshire brochure |
| 2026 | 72 × 80 in King | 30 × 73 in | – | 2026 Forest River Berkshire brochure |
Years not listed weren't published.
Is this your 40F?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2021 | Berkshire 40F | 40' 10" | – |
| 2023 | Berkshire 40F | 41' 0" | – |
| 2024 | Berkshire 40F | 41' 0" | – |
Other Berkshire mattress sizes
Sources
- Forest River (forestriverinc.com), archived copy: https://web.archive.org/web/20210514202141/https://www.forestriverinc.com/rvs/class-a-motorhomes/berkshire/40F/5807
- recreationalvehicles.info: https://recreationalvehicles.info/2021-forest-river-berkshire/2021-forest-river-berkshire-brochure-page-011.jpg
- Forest River (forestriverinc.com), archived copy: https://web.archive.org/web/20240804170232/https://forestriverinc.com/rvs/berkshire/40F/6484
- Forest River (forestriverinc.com), archived copy: https://web.archive.org/web/20250517082005/https://forestriverinc.com/rvs/berkshire/40F/9398
Questions
What size mattress is in the Forest River Berkshire 40F?
The main bed is 72 × 80 in (2026 Forest River Berkshire brochure, 2026).
What size are the Forest River Berkshire 40F bunk mattresses?
30 × 73 in (2026 Forest River Berkshire brochure, 2026).