Tenba invites you to Bring Your Own Bag. They know that there are some great bags out there that aren't Tenba bags. From 95-liter trekking backpacks to designer women's handbags, there are a lot of bags that work well for one job, but don't do well at protecting camera gear. Tenba's BYOB inserts are the solution. They fit a variety of camera systems, with pockets to organize accessories and their soft shells mold to fit the interior of virtually any bag. So keep using that backpack/courier/handbag/duffel that you love so much and just give your camera the protection it needs with a Tenba BYOB insert. The BYOB 13 fits a DSLR with 2-3 lenses and accessories (up to attached 70-200mm 2.8).