The Black Diamond Beta Light 45 Backpack is an ultralight 45-liter backpack designed for fast-moving backcountry travel, lightweight backpacking, and long-distance hiking. Built to meet the demands of modern ultralight backpacking, this pack combines minimalist design with durable materials to help you move efficiently through the mountains.

Inspired by feedback from Black Diamond athletes, the Beta Light 45 features a running-vest style suspension harness system adapted from the brand’s distance running packs. This innovative harness provides a secure, body-hugging fit that distributes weight comfortably while allowing quick access to essentials during long days on the trail.

With a 45L capacity, the pack offers enough space for multi-day trips while maintaining a lightweight, streamlined profile. Its weather-resistant construction and roll-top closure help protect gear from the elements, making it a reliable choice for extended backcountry adventures.

Ideal for thru-hiking, ultralight backpacking, and fastpacking, the Beta Light 45 is built for hikers who want to cover more ground with less weight. Whether you’re tackling a long-distance trail like the Pacific Crest Trail or heading out for a multi-day wilderness trip, this pack delivers lightweight performance without sacrificing comfort.

Capacity: 45 liters
Weight: Approximately 890 g / 1 lb 15 oz
Material: Ultra 200 body fabric with stretch mesh pockets
Frame: Frameless design with removable foam back panel
Harness System: Running-vest-inspired harness with dual sternum straps
Closure: Roll-top main compartment closure
Access: Top-loading design
Hydration Compatible: Yes
Compression: Side compression straps
Pockets: Stretch side pockets and front stretch mesh pocket
Color: Varies by season