1.Main material in 600D polyester, ripstop 2.Two main compartments and one front pocket 3.Interior pocket inside main compartment for computer or for securities 4.Interior organizers inside main compartment 5.CD/MP3 player pocket with exit port inside front pocket 6.Two mesh sides pockets for water bottle or small items 7.Compression straps at both sides to security the load weight 8.Fully padded back panel with spiral channel for air ventilation 9.Mesh tex lined shoulder straps with a control shape to guarantee freedom of movement