LostHorizon Tacoma Mattress – 4.5-inch Foam-Air Hybrid Camping Mattress for Rivian R1S | R-Value 13

Meet the LostHorizon Tacoma Mattress

The LostHorizon Tacoma Mattress blends foam and air into a 4.5-inch foam-air hybrid designed for real-world camping and overlanding. It features a self-inflating system paired with a portable pump, making setup quick and straightforward so you can spend less time fussing and more time enjoying the outdoors. Its thoughtful construction is built to hold up to a range of sleepers and environments, from roadside campsites to lakeside getaways, including use with vehicles like the Rivian R1S.

Key to its appeal is how the internal structure distributes air and foam evenly. The design helps minimize pressure points and creates a stable surface that feels both supportive and comfortable. The surface remains quiet during the night, allowing you to sleep with fewer disturbances from movement or squeaks often found in other air-based systems. The result is a sleep surface that adapts to your preferred feel—soft or firm—without sacrificing stability.

Comfort and Support that You Can Personalize

• 4.5-inch thickness with a 9-pound foam filling delivers solid, contouring support that can help reduce pressure points.
• Foam-air blend allows you to adjust softness and support to your liking for customized comfort.
• Internal air-foam distribution creates a stable, quiet sleeping surface with a 440-pound weight capacity.

Practical Benefits for Real-World Use

• Inflates and deflates quickly with the included portable pump—about 4 minutes from flat to ready.
• Four-season insulation with an impressive R-value of 13 helps maintain warmth on cooler nights.
• Designed for year-round adventures, from spring camping trips to winter overnights, with reliable all-weather performance.

Whether you’re loading up a Rivian R1S for off-road camping, or setting up in a remote campsite, the Tacoma Mattress is built to be a dependable sleep surface that adapts to your needs. It emphasizes comfort, ease of use, and durable insulation—key factors when you’re planning longer trips or weekend escapes. While no sleep solution can guarantee specific results, this hybrid mattress offers a versatile platform that could help you rest more comfortably in a variety of outdoor scenarios.