Custom size
- Hybrid
- 8 in thick
- cushion-firm
Sleep Foundation: Best Mattress for Pressure Relief Read review
Made to 54 × 74 inGet a quote
That isn't a standard mattress size, so order a custom size cut to your platform.
About the RV full 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.

Keystone's 2025 19RBS floorplan.
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2025 | Outback OBX 19RBS | 22' 0" | – |
The main bed is 54 × 74 in (Keystone spec sheet, 2025).