RV Mattress Buying Guide for the 2026 Keystone Hideout • 262BHS
Quick Answers
Known Mattress Sizes for the Hideout 262BHS
2026 Keystone Hideout 262BHS floorplan. Main bedroom is at the rear. Double-over-double bunk set is in the middle. Jackknife sofa and dinette are convertible sleeping surfaces, not replacement mattress platforms.
| Location | Platform Size | Available Options |
|---|---|---|
| Main Bedroom | 66″ × 80″ Olympic queen standard | MA 12″ Pocket Coil — Recommended |
| PA 15″ Nano-on-Coil — Premium upgrade | ||
| CUB 10″ HD Foam — Confirm fit | ||
| PUP 6″ Ultra-Slim — Confirm fit | ||
| Top Bunk | 52″ × 74″ Cannot supply — angled corner | |
| Bottom Bunk | 52″ × 74″ Cannot supply — angled corner |
What to Confirm Before Ordering
Order by measurements, not by mattress name
RV mattress names are not always consistent across manufacturers. “RV queen,” “short queen,” “bunk,” and “RV king” can refer to different dimensions, so order by the measured width × length before placing an order.
Measure the platform, not the mattress
Old RV foam mattresses compress and shrink. Measure the platform surface directly with a tape measure, not the mattress lying on it.
Account for any modifications
Pre-owned units may have modified platforms. Measure directly — don’t rely on factory specs, previous owner notes, or floorplan assumptions.
Check corner shape on every mattress platform
Look at all four corners of each mattress platform. Bottom bunks near ladders, walls, cabinets, and access points may have notched or angled corners that affect how a replacement mattress will sit on the platform. Ensure all four corners are square, as radius, notched, and angled cuts are not available at this time.
Confirm moving parts and closed-position space
If the mattress platform lifts, folds, slides, or stores away, check the space in both the sleeping and closed positions. A thicker replacement mattress may interfere with slide-outs, cabinets, doors, Murphy beds, lift-up storage platforms, or folding mechanisms.
Check bunk side rails
For bunk platforms with raised side rails, measure the usable depth inside the rail to ensure the replacement mattress will not sit too tall or reduce safe headroom.
From Factory Fit to Sleeping Cool — Understanding Your Options
The 2026 Keystone Hideout 262BHS is a bunkhouse travel trailer built around family sleeping capacity. The main bedroom platform measures 66″ × 80″ — an Olympic queen, wider and longer than the standard 60″ × 74″ RV queen. Olympic queen is an in-stock size across PolarBed’s MA, PA, CUB, and PUP lines. No custom cut is required for the main bedroom.
The two bunk platforms each measure 52″ × 74″, but both include a corner that is cut at an angle rather than square. A standard rectangular mattress cannot fill the platform. PolarBed is unable to supply replacement mattresses for the 262BHS bunk platforms.
Factory RV mattresses are engineered for weight efficiency and specific platform sizing. For owners who camp in warm weather or use the trailer regularly, a cooling replacement mattress for the main bedroom is worth the investment. Pocket coil systems and conductive cooling memory foam layers address the heat retention common in travel trailer interiors. Measure the main bedroom platform before ordering to confirm the 66″ × 80″ dimensions on your specific unit.
What PolarBed Does Differently for RV Sleep
PolarBed mattresses are built around the conditions that make RV sleeping difficult: non-standard platform sizes, bunk rail constraints, and trailer interiors that heat up faster and retain warmth longer than a home bedroom. Every product line is available in custom sizes for platforms that do not match any retail standard.
- PUP 6″ — Ultra-slim cooling foam designed for tight overhead space where a thicker mattress will not fit. The practical first choice when usable height above the platform is the limiting factor.
- CUB 10″ — HD foam with Conductive Cooling Memory Foam. Fuller support where available height allows, without the weight or cost of a coil system.
- MA 12″ — Pocket coil pillow top with Cool Gel Memory Foam. Coil layers allow airflow through the mattress core, which is especially relevant in warm trailer conditions. Recommended for the main bedroom upgrade.
- PA 15″ — 2,400 Nano-on-Coil luxury pillow top. Premium main bedroom upgrade where headroom allows. Not available for bunk or twin platforms.
- Custom sizing — All four product lines support custom-cut orders. Order by your confirmed platform measurements, not by the mattress name printed on your factory foam.
Sleep Location Mattress Options
Main Bedroom Options — 66″ × 80″ Olympic Queen
The 262BHS main bedroom platform measures 66″ × 80″, which matches the Olympic queen standard. In-stock Olympic queen variants are available for all four PolarBed lines.
Choosing the Right PolarBed Line
| Line | Thickness | Cooling Technology | Best For |
|---|---|---|---|
| PUP | 6″ | Cooling Memory Foam | Tight overhead space, bunk rails, and low-profile RV sleep areas |
| CUB | 10″ | Conductive Cooling Memory Foam | Bunks where available height allows a fuller mattress; double-size platforms; some main beds |
| MA | 12″ | Cool Gel Memory Foam + Pocket Coil | Recommended main bedroom upgrade; bunks only where available height allows |
| PA | 15″ | Cooling Pillow Top + 2,400 Nano-on-Coil | Premium main bedroom upgrade where mattress height is not restricted |
FAQs About the Hideout 262BHS Mattress Sizes
What size is the main bed in the 2026 Keystone Hideout 262BHS?
Can I replace the bunk mattresses in the 262BHS?
What does Olympic queen mean for the 262BHS main bed?
How many mattress platforms does the 262BHS have?
Which PolarBed line is recommended for the 262BHS main bedroom?
Do I still need to measure even if this guide shows dimensions?
Location-by-Location Fitment Details
- 66″ × 80″ is the Olympic queen standard — in-stock variants available across all four PolarBed lines.
- Measure your specific unit before ordering. Main bed corners are square.
- MA 12″ Pocket Coil is the recommended main bedroom upgrade.
- PA 15″ Nano-on-Coil is the premium step-up where mattress height is not restricted.
- CUB 10″ and PUP 6″ are available in this size — confirm overhead clearance before ordering.
- One corner of each bunk platform is cut at an angle rather than square.
- A standard rectangular mattress cannot fill an angled-corner platform.
- PolarBed cannot supply replacement mattresses for either bunk platform in this floorplan.
- Contact your dealer or an RV mattress specialist who works with custom-shaped mattresses for options.