The outer shell is constructed in 600D nylon that is treated for water resistance. On the front you will find a weather proof zippered pocket. Then unzip the main compartment to find general storage and an elastic mesh pocket for other essentials. The waist band is expandable from 25" - 47" and secures with a heavy duty clasp. Woven cord zipper pulls, and custom HEX Heritage logo lining round out the feature set on this travel bag.