600D Polyester - D stands for denier which represents how many fibers are in the cross-section of the material. With a lower denier (like 420D polyester) the fibers are more fine, however not as durable or strong as a higher number like 600D polyester.
Large main compartment with internal mesh zippered pocket
Side mesh water bottle pockets
Youth-specific shoulder straps with easy-to-use sternum strap
Front adjustable bungee cord
Comfortable, stitched foam back panel
Reflective safety piping
The North Face products can only be shipped within the U.S.