1.Material: 600D polyester, ripstop 2.Two main compartments with large zipper opening for easy stuff and loading 3.Separate interior pockets inside the main compartment for security 4.One front pocket with interior organizers 5.Reflective stripes at front side for safety at night 6.One easy-to-carry handle on top 7.Two mesh side pockets hold water bottle or small items 8.Breathable air mesh tex fully padded back panel, with air ventilation channel 9.Ergonomically shaped shoulder straps with completed-molded elastic, improved air circulation 10.V-loft pocket for CD/MP3 player, with quick zipper access