Custom size
- Hybrid
- 8 in thick
- cushion-firm
Sleep Foundation: Best Mattress for Pressure Relief Read review
Made to 56 × 84 inGet a quote
That isn't a standard mattress size, so order a custom size cut to your platform.
Ember spec sheet, 2027.
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Sleep Foundation: Best Mattress for Pressure Relief Read review

Ember's 2027 12RK floorplan.
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2025 | E-Series 12RK | 15'9" | 2 |
| 2026 | E-Series 12RK | 15'9" | 2 |
| 2027 | E-Series 12RK | 15'9" | 1-2 |
The main bed is 56 × 84 in (Ember spec sheet, 2027).