Mariposa 60

The Gossamer Gear Mariposa 60 has long been a go-to for ultralight backpackers seeking serious capacity without the weight penalty of a full frame. It's built around a removable aluminum stay and a dense foam back panel, offering a level of load support that's well beyond what you'd expect from its 1.9 lb weight. This isn't a frameless pack in the traditional sense; the removable stay and structured hipbelt work together to transfer weight effectively to your hips, making it comfortable with loads up to about 35 pounds. It truly shines when you've got a week's worth of food or need to carry a bear canister.

Material-wise, it primarily uses a custom 100D Robic nylon for the body, with a tougher 200D Robic on the bottom for improved abrasion resistance. This combination strikes a good balance between weight and durability for typical trail use, though it won't stand up to constant abuse against sharp rocks like a heavier pack might. The pack features a large main compartment, a substantial front mesh pocket perfect for wet gear or quick access items, and three large side pockets – two solid and one mesh. These pockets are genuinely useful, accommodating water bottles, tent poles, or extra layers, contributing significantly to its versatility and organization.

Compared to other ultralight 60L packs, the Mariposa sets itself apart with its asymmetrical side pocket design and superior hipbelt support for its weight class. While lighter frameless options exist, they often sacrifice load transfer or usable volume. The Mariposa provides a solid foundation for lightweight thru-hikers or weekend warriors who prioritize comfortable carrying over absolute minimal pack weight, especially when resupply points are far apart or winter gear is involved. It’s a well-thought-out workhorse that has earned its reputation.