Custom size
- Hybrid
- 8 in thick
- cushion-firm
Sleep Foundation: Best Mattress for Pressure Relief Read review
Made to 72 × 84 inGet a quote
That isn't a standard mattress size, so order a custom size cut to your platform.
Keystone 2022 brochure, 2022.
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Sleep Foundation: Best Mattress for Pressure Relief Read review

The Arcadia bedroom. Measure the platform, not the old mattress, before you buy.
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2021 | Arcadia 3660RL | 36 ft 6 in | 4 |
| 2022 | Arcadia 3660RL | 36 ft 6 in | 4 |
| 2023 | Arcadia 3660RL | 36 ft 6 in | 4 |
The main bed is 72 × 84 in (Keystone 2022 brochure, 2022).