Great all around
- Hybrid
- 13.25 in thick
- Soft / Medium / Firm
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$1,865RV King - 70x80 · list priceSee price
That's an RV king, 6 in narrower than a regular king (76 × 80 in). A regular king won't fit, so get an RV king in exactly 70 × 80 in.
About the RV king size →Keystone spec page, 2027.
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Sleep Foundation: Best Mattress Overall Read review
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The Cougar bedroom. Measure the platform, not the old mattress, before you buy.

Keystone's 2027 29RDS floorplan.
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2027 | Cougar Half-Ton 29RDS | – | 4 |
The main bed is 70 × 80 in (Keystone spec page, 2027).