Thumb Score: +11 First deal post ever, be gentle. Closeout. Cotopaxi's Allpa 42-liter travel backpack is perfect for days on the trail or at the airport thanks to its durable construction, multiple pockets for all essentials and a convenient pass-through back panel that easily attaches to a rolling suitcase. Durable nylon construction Easy-to-clean polyester lining Large main compartment with clamshell zip closure Internal pockets Side mesh water bottle pocket Two front zip pockets; one compatible with Allpa X hip pack Three grabs handles for convenience