The Klymit Inertia X Frame sleeping pad promises ultralight backpacking comfort, boasting impressive dimensions while weighing a mere 9.1 ounces. This review delves into the performance of this compact pad, examining its practicality and comfort levels across a range of temperatures and usage scenarios. We explore the ease of inflation, the innovative perforated design for sleeping bag integration, and the overall effectiveness as an insulating layer. Key features like the included pump and packability are also assessed.This comprehensive review considers both the advantages and disadvantages of the Inertia X Frame, particularly focusing on its narrow width and the impact this has on sleep stability and comfort. We detail experiences using the pad in various temperature conditions, both with and without a sleeping bag, to provide a realistic assessment of its suitability for different backpacking trips. The final verdict weighs the ultralight design against potential drawbacks, offering helpful insights for prospective buyers considering this ultralight sleeping pad option.
Read more: Thermarest vs Sea to Summit Winter Sleeping Pads: A Detailed Comparison
Specifications and Packability
The Klymit Inertia X Frame sleeping pad boasts impressive dimensions: 72 inches long, 18 inches wide, and 1.5 inches thick. Despite its size, it weighs a mere 9.1 ounces, packing down to roughly the size of a soda can (3 inches by 6 inches). This makes it incredibly packable for backpacking trips.
The pad includes a dry air pump, stuff sack, and patch kit – everything you need for convenient inflation and storage. The construction utilizes 30-denier polyester on top and 75-denier polyester on the bottom for durability and lightweight performance.
Inflation and Design
Inflation is a breeze. The pad inflates quickly with just a few breaths using the twist nozzle. For extra firmness, an external hand pump can be used via a secondary port. The unique design incorporates holes, contributing to its lightweight nature and allowing for better integration with a sleeping bag.
The holes are strategically designed to allow the loft of your sleeping bag to fill the gaps, preserving insulation even in these perforated areas. This clever design enhances warmth and comfort while maintaining the pad's ultralight profile.
Temperature Rating and Real-World Use
The reviewer estimates the pad as suitable for late spring, summer, and early fall (R1 rating). While comfortable in warmer temperatures, colder conditions (below freezing) were less ideal without additional insulation. A three-day trip in late March demonstrated the limitations in sub-freezing temperatures.
However, during a four-day trip in the mid-40s Fahrenheit using the pad inside a sleeping bag, comfort was significantly improved. This suggests its best use is as an insulating layer within a sleeping bag for temperatures above freezing.
Shortcomings and Considerations
The pad's narrow width (18 inches) is a significant drawback. The reviewer found themselves frequently sliding off the pad, especially when used outside the sleeping bag. A wider design, perhaps 20 or even 23 inches, would significantly enhance comfort and stability.
The limited contact points (hips, shoulders, head) also contribute to instability during sleep. While using the pad inside the sleeping bag mitigates this issue to some extent, it can make for a clammy and less comfortable sleep.
Overall Conclusion
The Klymit Inertia X Frame sleeping pad excels in its ultralight and packable design. Its quick inflation and integration with a sleeping bag are notable advantages. However, the narrow width and limited contact points significantly impact comfort, especially in colder temperatures or when used without a sleeping bag.
The plasticky feel when used directly against the skin also detracts from the experience. While suitable for warmer-weather backpacking trips, users should consider adding extra insulation for colder climates and explore alternative options if a wider sleeping pad is preferred.
