I have been using this backpack for the past four months, putting it through international travel, bike and hiking excursions and daily commuting and shopping trips in rain, shine and snow. My medium/ large pack has been a burly companion that can tote up to 34-liters-worth of stuff and weighs 2.9 pounds (1.3 kilograms).
The pack comes with a “lidlock” strap on the front designed specifically to secure your bike helmet and still leave room for a lock in the front pouch. Organization is made easier by the many different storage areas, including one curved zip pouch on the upper front, two on the lower-front sides and two on the shoulder straps (one designed for a cell phone and one for keys). Cinching points on both sides are good for strapping on additional items. Inside the pack is one large extendable storage area and a large pocket for papers and other flat items, as well as some smaller mesh pockets for keys, pens, money, etc. A second padded storage area, located further to the back, fits a medium- sized laptop. I’ve used this backpack in heavy rainfall and the contents stayed dry, thanks to the waterproof rain cover that tucks away on the underside of the pack.