- Hybrid
- 13.25 in thick
- Soft / Medium / Firm
Sleep Foundation: Best Mattress Overall Read review
That's an RV short king. RV mattress sellers stock it, or order a custom size.
About the RV short king size →Keystone spec sheet, 2023.
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Sleep Foundation: Best Mattress Overall Read review
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Some bunks have a rounded corner, so trace yours before a custom cut. A thicker bunk mattress takes headroom from the bunk above.
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 | 60 × 74 in Queen | – | – | Dealer report |
| 2023 | 72 × 75 in King | 34 × 74 in | – | Keystone spec sheet |
Years not listed weren't published.

Keystone's 2023 210URS floorplan.
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2017 | Outback 210URS | 23' 0" | – |
| 2018 | Outback Ultra-Lite 210URS | 23' | – |
| 2019 | Outback Ultra-Lite 210URS | 23' 0" | – |
| 2020 | Outback Ultra-Lite 210URS | 23' | – |
| 2021 | Outback Ultra-Lite 210URS | 23' 0" | – |
| 2022 | Outback Ultra-Lite 210URS | 23' 4" | – |
| 2023 | Outback Ultra-Lite 210URS | 23' 4" | – |
The main bed is 72 × 75 in (Keystone spec sheet, 2023).
34 × 74 in (Keystone spec sheet, 2023).