TRAIL BUM BUMMER SPECTRA

The main body weighs 320g. This model is closest to the original UL backpacks that were created in the 1990s. Its simple design features a main body with mesh pockets on the front and sides and a shoulder strap. It reminds us of the origins of UL backpacks, where a backpack can be lightweight with a simple design without using special materials.

We paid particular attention to the width and thickness of the shoulder strap, as well as the cushioning of the urethane foam. Not only does it distribute the load evenly across the entire surface, but the cushioning does not wear out even with long-term use, and it does not feel hard. This shoulder strap was born from numerous prototypes and discussions. It is a simple design, yet it is an important element in balancing the load.

The mesh front pocket, a signature design of UL backpacks, offers ample capacity for storing gear that is likely to get wet, such as shelters and rain gear. It uses a soft mesh that prioritizes UV resistance over stretch.

The side pockets are made of a soft mesh that is UV resistant. Although the Bummer has a small main body capacity of 35L, the side pockets are large enough to hold two bottles and deep enough to allow easy access even while wearing the pack, making it ideal for UL hikers on long hikes.