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.
Laptop sleeve: 11.75"h x 12.25"d
Dimensions: 19.3"h x 12.25"w x 7.5"d