Enjoy 3zip -

The design allows for a "rip-open" motion. By grabbing the top handle and pulling, you can instantly clear the top zippers for fast access to the main compartment.

Because the pack is made of three distinct panels, it can flex and expand more naturally than a single-panel pack, often allowing you to over-stuff it more effectively.

Splits the front panel vertically down the middle. ENJOY 3zip

Run vertically along the edges of the front panel.

Dana Gleason Interview :: The Invention of the 3Zip (Part 2) The design allows for a "rip-open" motion

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The design was a major leap forward from the traditional "clamshell" or "top-loading" styles. Dana Gleason noted that while the was a breakthrough, other innovations like the Live Wing hip belt were equally difficult to engineer to ensure that the pack pulled the load around the user's body rather than just pressing against the back. Splits the front panel vertically down the middle

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