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
Grand Design Influence 3904BH 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 →Grand Design spec sheet, 2027.
Bunks52 × 72 in / 30 × 70 in
Bunk. Grand Design spec sheet, 2027.
Common RV bunk sizes →
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
Bunk mattresses in 52 × 72 in / 30 × 70 in
Some bunks have a rounded corner, so trace yours before a custom cut. A thicker bunk mattress takes headroom from the bunk above.
Custom size
Mattress InsiderLuxury Gel Memory Foam
- Memory foam
- 8 in thick
- not stated
Made to 52 × 72 inGet a quote
The Influence bedroom. Measure the platform, not the old mattress, before you buy.
Bed sizes by year
| Year | Main bed | Bunks | Other beds | Source |
|---|---|---|---|---|
| 2026 | 60 × 80 in Queen | 52 × 72 in, 30 × 70 in | – | Grand Design 2026 model-year brochure |
| 2026 | 60 × 80 in Queen (king optional) | 52 × 72 in, 30 × 70 in | – | Grand Design spec sheet |
| 2027 | 60 × 80 in | – | – | Dealer report |
| 2027 | 60 × 80 in Queen (king optional) | 52 × 72 in, 30 × 70 in | – | Grand Design spec sheet |
Years not listed weren't published.
The 3904BH floorplan
Grand Design's 2027 3904BH floorplan.
Is this your 3904BH?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2026 | Influence 3904BH | 42' 8" | 9 |
| 2027 | Influence 3904BH | 42' 8" | 9 |
Other Influence mattress sizes
Sources
- Grand Design (granddesignrv.com), archived copy: https://web.archive.org/web/20260416011702/https://www.granddesignrv.com/fifth-wheels/influence/3904bh
- Grand Design (granddesignrv.com): https://www.granddesignrv.com/fifth-wheels/influence/3904bh
Questions
What size mattress is in the Grand Design Influence 3904BH?
The main bed is 60 × 80 in (Grand Design spec sheet, 2027).
What size are the Grand Design Influence 3904BH bunk mattresses?
52 × 72 in / 30 × 70 in (Grand Design spec sheet, 2027).