Black Diamond Theorem 30 Backpack - Unisex


Colour: Black

Size: One Size

Delivery options:

Rocksolid guarantee

Shop with confidence. If it’s not working out, you can return it (consumables, electronics, undergarments and swimwear excluded).
Really. If it's not up to snuff after you use it (a couple times) you can still bring it back. It lasts longer than 30 days, but not forever. We'll be fair about it.


A 30-liter daypack that blends functionality with unparalleled style, the Theorem 30 holds everything you need for life’s multi-purpose missions. The internal organizer features a key-leash and zippered mesh pockets, while the electronics sleeve can be accessed both internally and externally.

  • Durable water-resistant polyester is made from 100% recycled PET bottles
  • Large main compartment with internal divider and sleeve for electronics
  • External padded laptop sleeve
  • Stretch side water bottle pockets
  • Padded back-panel with ventilated air channel and breathable air-mesh
  • Reflective details for better visibility during dark commutes

Tech specs

Ideal for
  • Office and school
  • Day hiking
  • Top
  • Front
  • Waistbelt
  • 13-inch laptop
Ventilated back panelYes
Additional feature(s)
  • Reflective details
  • Compression straps
Product sustainability
  • Recycled content
Made inVietnam


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