- Hybrid
- 13.25 in thick
- Soft / Medium / Firm
Sleep Foundation: Best Mattress Overall Read review
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 →Owner report, 2023. A reported size, not a guarantee: measure your platform first.
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Sleep Foundation: Best Mattress Overall Read review
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The Rockwood bedroom. Measure the platform, not the old mattress, before you buy.
| Year | Main bed | Bunks | Other beds | Source |
|---|---|---|---|---|
| 2020 | 60 × 80 in Queen | – | – | 2020 Forest River Rockwood Travel Trailers brochure |
| 2023 | 72 × 80 in | – | – | Owner report |
Years not listed weren't published.

Forest River's 2021 2912BS floorplan.
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2019 | Rockwood Ultra Lite 2912BS | 35' 2" | – |
| 2020 | Rockwood Ultra Lite 2912BS | 35' 2" | – |
| 2021 | Rockwood Ultra Lite 2912BS | 35' 2" | – |
The main bed is 72 × 80 in (Owner report, 2023).