Eberlestock Mainframe Freighter Frame Pack - With over 100 possible combinations, you can always make sure that you have the right gear, right when you need it. Combine it with one of the Eberlestock duffels, dry bags, or zip-on packs to build the style of pack that you need. The modular system work...

Eberlestock Mainframe Freighter Frame Pack - The F1 Mainframe represents what is arguably the greatest innovation in modern pack making, the holy grail of a great modular pack system. But unlike any other pack system, with this load bearing workhorse as a base, you can build a true ultra-light pack ...