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 Cougar 355FBS 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 →Keystone spec page, 2027.
Mattresses in 60 × 80 in
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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 Cougar bedroom. Measure the platform, not the old mattress, before you buy.
Bed sizes by year
| Year | Main bed | Bunks | Other beds | Source |
|---|---|---|---|---|
| 2022 | 60 × 80 in Queen | – | – | Dealer report |
| 2027 | 60 × 80 in Queen | – | – | Keystone spec page |
Years not listed weren't published.
The 355FBS floorplan
Keystone's 2027 355FBS floorplan.
Is this your 355FBS?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2021 | Cougar 355FBS | 39 ft 3 in | 6 |
| 2022 | Cougar 355FBS | 39 ft 3 in | 6 |
| 2023 | Cougar 355FBS | 39 ft 3 in | 6 |
| 2024 | Cougar 355FBS | 39 ft 3 in | 6 |
| 2025 | Cougar 355FBS | 39 ft 3 in | 6 |
| 2026 | Cougar 355FBS | 39 ft 3 in | 6 |
| 2027 | Cougar 355FBS | 39 ft 3 in | 6 |
Other Cougar mattress sizes
Sources
- Keystone (keystonerv.com): https://www.keystonerv.com/product/cougar/premium-fifth-wheels/floorplans/355FBS
Questions
What size mattress is in the Keystone Cougar 355FBS?
The main bed is 60 × 80 in (Keystone spec page, 2027).