Great all around
RVMattress.comSignature Hybrid
- Hybrid
- 13.25 in thick
- Soft / Medium / Firm
Sleep Foundation: Best Mattress Overall Read review
$1,465Queen · list priceSee price
Keystone Montana 3900RK mattress size
Main bed60 × 80 inQueen
That's the same size as a regular queen, so any standard queen mattress fits.
About the RV queen size →Dealer report, 2027. A reported size, not a guarantee: measure your platform first.
Mattresses in 60 × 80 in
We may earn a commission when you buy through some of these links. It doesn't change which mattresses we list.
Best value
RVMattress.comCopperFlex Essential
- All-foam
- 6 in thick
- five comfort options
$524Queen · list priceSee price
Firm
RVMattress.comPlank Firm Luxe
- Hybrid
- 13 in thick
- Firm / Extra Firm
$1,598Queen · 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
$1,999Queen · list priceSee price
Heavy duty
RVMattress.comTitan Plus Luxe
- Hybrid
- 13 in thick
- Plush
$1,665Queen · list priceSee price
Helix pick
HelixHelix Midnight
- Hybrid
- 11.5 in thick
- Medium Feel
Sleep Foundation: Best Mattress for Side Sleepers Read review
$1,183Queen · list priceSee price
RV hybrid
RVMattress.comCopperFlex RV Hybrid
- Hybrid
- 10 in thick
- Medium-Firm
$799Queen · list priceSee price
Custom size
Mattress InsiderLuxury Gel Memory Foam
- Memory foam
- 8 in thick
- not stated
Made to 60 × 80 inGet a quote
The Montana bedroom. Measure the platform, not the old mattress, before you buy.
The 3900RK floorplan
Keystone's 2027 3900RK floorplan.
Is this your 3900RK?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2026 | Montana 3900RK | – | 6 |
| 2027 | Montana 3900RK | 43 ft 10 in | 6 |
Other Montana mattress sizes
Sources
- Keystone (keystonerv.com): https://www.keystonerv.com/product/montana/luxury-fifth-wheels/floorplans/3900RK
Questions
What size mattress is in the Keystone Montana 3900RK?
The main bed is 60 × 80 in (Dealer report, 2027).