You can unzip just the top to use it as a traditional top-loader, or pull the center zip to "splay" the pack open like a suitcase. This allows you to reach items at the very bottom without digging through everything else.
The geometry of the Y-shape helps distribute the weight load across the zippers more evenly, reducing the likelihood of a single point of failure under heavy loads. 🛡️ Popular Models Featuring 3-Zip Primary Use Notable Feature ASAP Military/Tactical Lightweight, radio-ready, and ultra-durable. Urban Assault Daily Commute/EDC Sleek exterior with internal laptop sleeves. 3-Day Assault (3DAP) Tactical/Hiking The "gold standard" for durability and modularity. Coulee Series Focuses on comfort with exterior stretch pockets. 🛠️ Design Evolution ENJOY 3zip
Do you need help with (Futura Yoke system)? You can unzip just the top to use
Dana Gleason Interview :: The Invention of the 3Zip (Part 2) 🛡️ Popular Models Featuring 3-Zip Primary Use Notable
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.