Custom size
- Hybrid
- 8 in thick
- cushion-firm
Sleep Foundation: Best Mattress for Pressure Relief Read review
Made to 72 × 74 inGet a quote
That's an RV short king. Few brands stock 72 × 74 in, so order a custom size.
About the RV short king size →Keystone spec sheet, 2025.
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Sleep Foundation: Best Mattress for Pressure Relief Read review

The Outback bedroom. Measure the platform, not the old mattress, before you buy.
| Year | Main bed | Bunks | Other beds | Source |
|---|---|---|---|---|
| 2023 | 72 × 74 in King | – | – | Keystone spec sheet |
| 2024 | 72 × 74 in King | – | – | Keystone spec sheet |
| 2025 | 72 × 74 in King | – | – | Keystone spec sheet |
Years not listed weren't published.

Keystone's 2025 342CG floorplan.
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2021 | Outback 342CG | 38' 0" | – |
| 2022 | Outback 342CG | 38' 0" | – |
| 2023 | Outback 342CG | 38' 0" | – |
| 2024 | Outback 342CG | 38' 0" | – |
| 2025 | Outback 342CG | 37' 5" | – |
The main bed is 72 × 74 in (Keystone spec sheet, 2025).