The Inertia X Frame's alien-like, minimalist features raised eyebrows when it first came out, but rest assured: This pad is comfier than it looks. When Klymit designed the pad, they used “body-mapping” to identify which parts of the body need the most support and removed everything else. The result: A skeletal pad that weighs just 9.1 ounces—less than a can of beer. It’s a good choice for ultralight hikers, but the body mapping technology only fits so many people so well, and the 72-inch long pad might not prove to be as comfortable for shorter people. Buy Klymit Inertia X Frame Sleeping Pad now for $35 (50% off).