BackCountry.com:

The incredible comfort and support of The North Face Catalyst 75 Backpack won it the 2005 Backpacker Magazine Editors Choice Award. The secret to the Catalyst 75s comfort is the Pivotal suspension system. Pivotal gives you amazing support with its burly frame while flexing with your body to allow a natural stride and help your balance when youre on really rough trails. This 75L (4600cu in) pack from The North Face is a great size for backpacking trips up to a week. The Catalysts sleeping bag compartment and side access lets you get to any part of the pack, so you can find your headlamp without unloading everything. Theres even a removable hydration sleeve for short hikes away from camp.

Altrec.com:

A backpacker's backpack, The North Face Catalyst 75 is a large-capacity pack is ideal for multiday trips. A unique hipbelt configuration with two pivot points lets each side rotate independently, enabling subtle, asymmetric body movements on varied terrain. The comfort features of the Catalyst 75 include E-VAP foam back and hip padding, ensure breathability and on-the-move comfort for continued use. Full right-side zip allows access to both main and sleeping bag compartment and the left side expandable pocket is ideal for holding bulky items. Internal mesh organizer pocket and adjustable compression system keep you organized even on long trips and with an internal mesh zip pocket in the lid, you know where you put your keys when you return to the car after a week-long backcountry adventure.