Top pick
RVMattress.comSignature Hybrid
- Hybrid
- 13.25 in thick
- Soft / Medium / Firm
Sleep Foundation: Best Mattress Overall Read review
$1,465Queen · list priceSee price
Jayco Seismic 3912 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 →Jayco spec sheet, 2015.
Bunks60 × 80 in
Bunk. Jayco spec sheet, 2014.
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
Mattress InsiderThe Sedona
- All-foam
- 5.5 in thick
- Firm
$36160" 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
$1,999Queen · list priceSee price
Best memory foam
Mattress InsiderElation Gel Foam
- Memory foam
- 6 in thick
- cushion firm
$45960" x 80" · list priceSee price
Best hybrid
RVMattress.comCopperFlex RV Hybrid
- Hybrid
- 10 in thick
- Medium-Firm
$799Queen · 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
$1,332Queen · list priceSee price
Reviewer pick
HelixHelix Midnight
- Hybrid
- 11.5 in thick
- Medium Feel
Sleep Foundation: Best Mattress for Side Sleepers Read review
$1,183Queen · 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
$66960" x 80" · list priceSee price
Bunk mattresses in 60 × 80 in
Some bunks have a rounded corner, so trace yours before a custom cut. A thicker bunk mattress takes headroom from the bunk above.
Top pick
RVMattress.comSignature Hybrid
- Hybrid
- 13.25 in thick
- Soft / Medium / Firm
Sleep Foundation: Best Mattress Overall Read review
$1,465Queen · list priceSee price
Best value
Mattress InsiderThe Sedona
- All-foam
- 5.5 in thick
- Firm
$36160" 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
$1,999Queen · list priceSee price
Best memory foam
Mattress InsiderElation Gel Foam
- Memory foam
- 6 in thick
- cushion firm
$45960" x 80" · list priceSee price
The Seismic bedroom. Measure the platform, not the old mattress, before you buy.
Bed sizes by year
| Year | Main bed | Bunks | Other beds | Source |
|---|---|---|---|---|
| 2013 | 60 × 80 in Queen | 60 × 80 in | – | Jayco spec sheet |
| 2014 | 60 × 80 in Queen | 60 × 80 in | – | Jayco spec sheet |
| 2015 | 60 × 80 in Queen | – | – | Jayco spec sheet |
Years not listed weren't published.
The 3912 floorplan
Jayco's 2015 3912 floorplan.
Is this your 3912?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2013 | Seismic 3912 | 44' 2" | 8-10 |
| 2014 | Seismic 3912 | 44' 2" | 9-10 |
| 2015 | Seismic 3912 | 42' 7" | 8 |
Other Seismic mattress sizes
Sources
- Jayco (jayco.com), archived copy: https://web.archive.org/web/20160503205701/http://www.jayco.com:80/tools/archive/2013-seismic-th/
- Jayco (jayco.com), archived copy: https://web.archive.org/web/20160105115722/http://www.jayco.com:80/tools/archive/2014-seismic/3912/
- Jayco (jayco.com), archived copy: https://web.archive.org/web/20151022123723/http://www.jayco.com:80/tools/archive/2015-seismic/3912/
Questions
What size mattress is in the Jayco Seismic 3912?
The main bed is 60 × 80 in (Jayco spec sheet, 2015).
What size are the Jayco Seismic 3912 bunk mattresses?
60 × 80 in (Jayco spec sheet, 2014).