Now made with USA-built X-Pac fabric, the Aux Compartment is a modular shoulder bag and add-on pouch for the Errant Pack, Errant Pro, Errant Sling, and Rennen Pro. It has two roomy compartments and smart pockets to keep your everyday items in place. Built from durable, weatherproof materials, this waterproof pouch is made to last and ready for travel, commuting, or daily use.
Commute Ready
Quick Stow
Store Accessories
Compact Design
Enjoy free 2-day express shipping on U.S. orders $100+ and fast international shipping on orders $400+. Learn more Shipping Delivery. 30-day return policy.
Every Boundary backpack is designed to work together. Swap, attach, or combine modules to build the perfect setup, whether it’s for a quick trip, a workday, or anything in between.
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