Keystone Hideout 38FKDS mattress size
Years 2015–2017Sold as Hideout
Bunk mattresses in 32 × 74 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.comCopperFlex Essential
- All-foam
- 6 in thick
- five comfort options

RVMattress.comCopperFlex RV Hybrid
- Hybrid
- 10 in thick
- Medium-Firm

Mattress InsiderPark Meadow Encased Coil II
- Hybrid
- 8 in thick
- cushion-firm
Sleep Foundation: Best Mattress for Pressure Relief Read review
The 38FKDS floorplan

Keystone's 2017 38FKDS floorplan.
Is this your 38FKDS?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
| 2015 | Hideout 38FKDS | – | – |
| 2017 | Hideout 38FKDS | – | – |
Other Hideout mattress sizes
Questions
What size are the Keystone Hideout 38FKDS bunk mattresses?
32 × 74 in (Keystone spec sheet, 2017).