Great all around
RVMattress.comSignature Hybrid
- Hybrid
- 13.25 in thick
- Soft / Medium / Firm
Sleep Foundation: Best Mattress Overall Read review
$1,465Olympic Queen - 66x80 · list priceSee price
Heartland Sundance 27MLOK mattress size
Main bed66 × 80 inOlympic queen
That's an Olympic queen, 6 in wider than a regular queen. RV mattress sellers stock it; a regular queen would leave 6 in of platform bare.
Heartland spec page, 2026.
Mattresses in 66 × 80 in
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Best value
RVMattress.comCopperFlex Essential
- All-foam
- 6 in thick
- five comfort options
$799Olympic Queen - 66x80 · list priceSee price
Firm
RVMattress.comPlank Firm Luxe
- Hybrid
- 13 in thick
- Firm / Extra Firm
$1,865Olympic Queen - 66x80 · list priceSee price
Cooling
RVMattress.comAurora Luxe Cooling
- Hybrid
- 13.25 in thick
- Soft / Medium / Firm
Sleep Foundation: Best Mattress for Temperature Regulation Read review
$1,999Olympic Queen - 66x80 · list priceSee price
RV hybrid
RVMattress.comCopperFlex RV Hybrid
- Hybrid
- 10 in thick
- Medium-Firm
$799Olympic Queen - 66x80 · list priceSee price
Custom size
Mattress InsiderLuxury Gel Memory Foam
- Memory foam
- 8 in thick
- not stated
Made to 66 × 80 inGet a quote
The Sundance bedroom. Measure the platform, not the old mattress, before you buy.
The 27MLOK floorplan
Heartland's 2026 27MLOK floorplan.
Is this your 27MLOK?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2026 | Sundance 27MLOK | 32' 9" | Up to 2 |
Other Sundance mattress sizes
Sources
- Heartland (heartlandrvs.com): https://heartlandrvs.com/rv-model/27mlok/
Questions
What size mattress is in the Heartland Sundance 27MLOK?
The main bed is 66 × 80 in (Heartland spec page, 2026).