The (often stylized as the 3-Zip or Tri-Zip) is a signature pack design pioneered by Dana Gleason of Mystery Ranch . Originally popularized through military and firefighting gear, this design has become a cult favorite in the backpacking and everyday carry (EDC) communities for its unique "Y-shaped" zipper configuration. 🎒 The Core Design Concept The 3-Zip system consists of three separate zippers:
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. ENJOY 3zip
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 The (often stylized as the 3-Zip or Tri-Zip)
If you're looking for a specific or instructional guide for a certain pack, please let me know: Which model (e.g., Urban Assault 3-Day Assault Go to product viewer dialog for this item. ) are you looking at? This allows you to reach items at the
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.