600D polyester, 1200D polyester, 450D x 300D heather polyester, 600D geo emboss polyester. The FlexVent™ suspension system boasts custom injection-molded shoulder straps and a padded mesh back panel with a spine channel for maximum support and ventilation. Floating padded laptop sleeve in main compartment. Secondary compartment has interior organization with a secure zippered pocket, Velcro® pocket and pen pockets. Reflective bike-light loop, reflective water bottle tabs and reflective shoulder strap webbing create 360-degrees of reflectivity. Two mesh water bottle pockets, comfortable, padded top haul handle, sternum strap with whistle buckle. Contrast embroidered The North Face logo on front.
Average weight: 1 lb. 15.39 oz. (890 g)
Volume: 1709 in³ (28 liters)
Laptop sleeve: 11.75"h x 12.25"d
Dimensions: 19.3"h x 12.25"w x 7.5"d

ENDORSED BY THE AMERICAN CHIROPRACTIC ASSOCIATION (ACA): Built to reduce pressure on the shoulders and back so you can comfortably carry a heavy load.