Custom size
- Hybrid
- 8 in thick
- cushion-firm
Sleep Foundation: Best Mattress for Pressure Relief Read review
Made to 68 × 76 inGet a quote
That isn't a standard mattress size, so order a custom size cut to your platform.
Dealer report, 2026. A reported size, not a guarantee: measure your platform first.
We may earn a commission when you buy through some of these links. It doesn't change which mattresses we list.
Sleep Foundation: Best Mattress for Pressure Relief Read review

The Raptor bedroom. Measure the platform, not the old mattress, before you buy.

Keystone's 2026 441HB floorplan.
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2026 | Raptor 441HB | 45 ft 9 in | 9 |
The main bed is 68 × 76 in (Dealer report, 2026).