Car Camping Mattresses & Pads · Lost Horizon
Lost Horizon Option3 Self-Inflating Foam Camping Mattress, Full, 4.5"
- self-inflatingType
- 80 inLength
- 52 inWidth
- 4.5 inThickness
- 13R-value (insulation)
- 2Sleeps
A thick 4.5-inch foam mattress rated R13, for winter in a rooftop tent or the back of a truck.
Ideal for: Winter campers and rooftop-tent owners who leave the mattress in place.
Where it sits
Premium in our car camping mattresses & pads picks. We have not tested this product hands-on, so we do not give it a score or star rating — compare the verified specs instead.
Full specifications
| Build | |
|---|---|
| Type | self-inflating |
| Cover material | TPU-laminated polyester |
| Warranty | — |
| Fit | |
| Length | 80 in |
| Width | 52 in |
| Sleeps | 2 |
| Comfort | |
| Thickness | 4.5 in |
| R-value (insulation) | 13 |
| Packing | |
| Weight | 16.1 lb |
| Packed size | — |
| Setup | |
| Pump included | No |
Other details
- Weight (listing)
- 16.1 lb (7.3 kg)
- Max load (listing)
- 440 lb
- Pump
- Sold separately (listing)
2 of 11 fields not yet confirmed (shown as “—”). Sourced only from the Amazon listing and the manufacturer's official page (see Data sources). Product images are illustrations, not product photos.
The Option3 is 80 × 52 × 4.5 in of solid foam with air, TPU-laminated polyester, adjustable firmness and a listed R-value of 13. It weighs 7.3 kg (16.1 lb) and the listing is honest that deflating takes patience; an electric pump is sold separately.
It's the warmest and thickest pad here, at the cost of weight and packed size.
Pictures on this page are illustrations, not product photos. Open the Amazon listing for real photos, today's price and buyer reviews.
Pros
- R-value 13 (listing)
- 4.5 in thick
- Adjustable firmness
Cons
- 16 lb and bulky
- Slow to deflate, pump not included
What buyers say
We don't summarize or score buyer reviews here. Read them on the Amazon listing.
Data sources
- amazon Amazon listing (B09XLGQ6GR) · accessed 2026-11-03
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