Expanding from daypack to travel backpack, this multipurpose wax canvas backpack is made from 100% recycled fabrics. Made with bluesign approved, 100% recycled polyester fabrics and a waxed canvas with a PFC free durable water-resistant coating Internal zippered pocket stores a phone, charger and other small items during travel Quick-access external stash pocket helps store small items TPU divider helps keep items separated during travel, is easy to clean, and tucks away when not in use Expands from a 28L daypack to a 32L travel backpack for 15% more packable space Zippered top pocket keeps small items secure, organized and within reach External daisy chain allows you to attach items to the bag Dedicated water bottle pocket keeps your bottle secure and within reach Padded storage protects a 15.6" PC/16" MacBook and 12.9" tablet Compatible with the Thule Aion Sling Bag which doubles up as a supportive hip belt (sold separately) Pass-through panel allows you to secure the backpack to rolling luggage