Top pick
RVMattress.comCopperFlex RV Hybrid
- Hybrid
- 10 in thick
- Medium-Firm
$699RV Bunk - 30x74 · list priceSee price
Forest River Flagstaff 21HS mattress size
Main bed30 × 74 inBunk
RV mattress sellers stock this exact size, or order a custom size cut to your platform.
About the RV bunk size →2026 Forest River Flagstaff Tent Campers brochure, 2026.
Mattresses in 30 × 74 in
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Custom size
Mattress InsiderPark Meadow Encased Coil II
- Hybrid
- 8 in thick
- cushion-firm
Sleep Foundation: Best Mattress for Pressure Relief Read review
Made to 30 × 74 inGet a quote
The Flagstaff bedroom. Measure the platform, not the old mattress, before you buy.
Is this your 21HS?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2025 | Flagstaff Hardside T21HS | – | – |
| 2026 | Flagstaff Hardside T21HS | 20' 4" | – |
Other Flagstaff mattress sizes
Sources
- recreationalvehicles.info: https://recreationalvehicles.info/2026-forest-river-flagstaff-tent-campers/2026-forest-river-flagstaff-tent-campers-brochure-page-002.jpg
- Forest River (forestriverinc.com), archived copy: https://web.archive.org/web/20260306052912/https://forestriverinc.com/rvs/flagstaff-hard-side-pop-up-campers/T21HS/9698
Questions
What size mattress is in the Forest River Flagstaff 21HS?
The main bed is 30 × 74 in (2026 Forest River Flagstaff Tent Campers brochure, 2026).