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A 3-size expandable BACKPACK designed to streamline and simplify travel. Inspired by our A10 but with unique backpack features and capabilities.
- Removable hip belt
- IP64 Water-resistance (against short periods of light rain and splashing water)
- Up to 15.5" laptop compartment
- Multiple grab handles
- Luggage strap
- Interior loop organizers
- Side compression straps
- 420D Cordura Nylon
- Waterproof YKK zippers
- Aerated rear mesh panel
- 2.9 pounds / 1.3kg (w/o waist belt)
- 3.3 pounds /1.5kg (w/ waist belt)
- Extensively tested for durability
S SIZE: 12.2" x 12.2" x 16" / 31 x 31 x 41 cm
M SIZE: 12.2" x 12.2" x 24" / 31 x 31 x 61 cm
L SIZE: 12.2" x 12.2" x 24" / 31 x 31 x 82 cm
B3 - THE ULTIMATE ADJUSTABLE BACKPACK
A SMALL, MEDIUM, AND LARGE BACKPACK - ALL IN ONE

SEAMLESSLY TRANSITION BETWEEN DIFFERENT ACTIVITIES
YOUR DAY, WEEEKEND, AND TRAVEL COMPANION



Great
Nice thing, but I need more outer pockets and the ends of the 4 pull straps (which are on the sides) can't be fixed in any way.

B3’s Got My Back!
Love this bag! Used it on a few different trips and its ability to adjust is very convenient. It's tough, adaptable, and looks cool.
A Thoughtful Design with Some Tweaks Needed
After several months with the B3, here’s the lowdown: it’s a solid pack built to endure the rigors of travel. The ability to shift between sizes is more than just a convenience; it’s a necessity fulfilled brilliantly. The material stands up to scrapes and dust, cleaning up like new with a simple wipe. On functionality—top marks for the volume adjustability and general durability. The new strap construction and upgrades make this bag significantly better than the first Kickstarter version. The magnetic cord pockets are a neat touch. The interior could use a few more pockets and it’s also lacking a water bottle pocket. Despite these issues, the B3 backpack's utility and design keep it in the upper echelons of travel gear. It's not just a backpack; it's a travel solution that understands the fluid needs of the modern adventure