Top pick
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
Keystone Hideout 310XBR 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.
Keystone spec page, 2027.
Mattresses in 66 × 80 in
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Best value
Mattress InsiderElation Gel Foam
- Memory foam
- 6 in thick
- cushion firm
$50966" x 80" · list priceSee price
Reviewers' favorite
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
Best memory foam
Mattress InsiderLuxury Gel Memory Foam
- Memory foam
- 8 in thick
- not stated
$89966" x 80" · list priceSee price
Best hybrid
RVMattress.comCopperFlex RV Hybrid
- Hybrid
- 10 in thick
- Medium-Firm
$799Olympic Queen - 66x80 · list priceSee price
Best all-foam
RVMattress.comPlank Firm
- All-foam
- 10 in thick
- Firm / Extra Firm
Mattress Clarity: Best RV Mattress for Heavy People Read review
$1,532Olympic Queen - 66x80 · list priceSee price
Reviewer pick
Mattress InsiderPark Meadow Encased Coil II
- Hybrid
- 8 in thick
- cushion-firm
Sleep Foundation: Best Mattress for Pressure Relief Read review
$79966" x 80" · list priceSee price
Custom size
Mattress InsiderThe Sedona
- All-foam
- 5.5 in thick
- Firm
Made to 66 × 80 inGet a quote
The 310XBR floorplan
Keystone's 2027 310XBR floorplan.
Is this your 310XBR?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2026 | Hideout MAX 310XBR | 35 ft 11 in | 9 |
| 2027 | Hideout MAX 310XBR | 35 ft 11 in | 8 |
Other Hideout mattress sizes
Sources
- Keystone (keystonerv.com): https://www.keystonerv.com/product/hideout-max/comfort-travel-trailers/floorplans/310XBR
Questions
What size mattress is in the Keystone Hideout 310XBR?
The main bed is 66 × 80 in (Keystone spec page, 2027).