Made with 300D polyester w/heavy vinyl backing. Large main compartment with two-way zippered closure. Inside zippered mesh pocket. Padded laptop/tablet slip pocket in main compartment with synthetic felt lining. Top zippered pocket with synthetic felt lining. Front zippered pocket. Side pockets with elastic edge to hold water bottles or small items in place. (BACKPACK E728) Material: 300 Denier w/ Heavy Vinyl Backing. Available Colors: Heather Grey