LOSTHORIZON Truck Bed Camping Air Mattress with Foam - 4.5in Comfort

In this review of the LOSTHORIZON Truck Bed Camping Air Mattress the bottom line is simple: it is made for car-campers who want a near-camp mattress feel inside a short full-size truck bed. The pad combines a 4.5in foam core with adjustable air chambers to deliver a sleeping surface that is noticeably more supportive than a standard air pad, and its custom sizing for 5.5-5.8ft beds means minimal fuss to fit and set up. For people who sleep in truck beds most weekends and want insulation plus quiet stability, this pad stands out.

Key Features

• Custom sizing: Designed to fit most full size 5.5 - 5.8ft short truck beds so you get a tailored sleeping area without excess bulk.
• Thick foam support: The 4.5in thickness with a 10-pound foam filling provides substantial support and reduces pressure points for overnight comfort.
• Adjustable firmness: The hybrid foam-and-air construction lets you fine-tune softness and support for a personalized sleep surface.
• Four-season insulation: An R-value of 13 plus dense foam offers strong insulation for cool-weather truck camping.
• Fast inflation and deflation: Included portable air pump makes setup and breakdown quick, and the valve design is simple to operate.
• Stable and quiet: The internal structure keeps air and foam evenly distributed, minimizing noise and movement disturbances overnight.

Who It's For

Campers who regularly sleep in short full-size truck beds and want a mattress that fits without trimming will appreciate this pad; it suits solo sleepers and couples within the stated weight capacity who want a thicker, insulated surface than a roll pad. Its combination of foam and air is ideal for those who prefer adjustable firmness and expect multi-season use.

It is not meant for backpacking or ultralight pursuits, and people seeking a lightweight inflatable that packs into a tiny stuff sack should look elsewhere. Buyers who need a perpetually fail-safe pump system should be aware that some users report pump inconsistencies.

Pros & Cons

Pros

• Comfortable 4.5in foam thickness that reduces pressure points and improves sleep quality.
• Custom fit for 5.5-5.8ft truck beds means faster setup and less shifting inside the bed.
• High R-value and dense foam give reliable insulation for cooler conditions.
• Adjustable air/foam design allows personalization of firmness for different sleepers.

Cons

• Included pump has mixed reports of reliability from customers, so some may need a replacement pump over time.
• At 4.5in and with 10 lb foam, it is not suitable for backpacking or where minimal weight and bulk are required.

Specifications

Intended bed size	Full size 5.5 - 5.8ft short truck bed
Thickness	4.5in
Foam filling weight	10 pounds
Weight capacity	Up to 440 pounds
R-value	13
Inflation method	Portable air pump, twist valve for deflation
Warranty	1-year

Our Verdict

The LOSTHORIZON truck bed mattress is a strong choice for truck campers who prioritize comfortable, insulated sleep and a pad that fits a short full-size bed without modification. It delivers better pressure relief and quieter stability than many air-only pads, and the adjustable foam-plus-air design makes it versatile. Expect good value if you need a durable, four-season truck-bed sleeping surface, but be prepared to replace the pump if you encounter a rare failure.

Frequently Asked Questions

Will this mattress fit my full-size short truck bed?
Yes, it is specifically designed for most full size 5.5 - 5.8ft short truck beds for a tailored fit.

Is it warm enough for cold-weather camping?
Yes, the pad has an R-value of 13 and 10 lb foam filling, providing strong insulation for spring through winter use.

Does the pump reliably inflate the mattress?
The portable pump inflates quickly for many users, but there are mixed reports of pump failures, so keep that in mind and contact warranty support if needed.