1.Material: waterproof 600D polyester ripstop 2.Two main compartments 3.One front pocket with organizer pockets inside 4.S-curved shoulder straps with elastic comb providing ultimate comfort and light weight 5.Adjustable sternum strap keeps pack from swaying side to side 6.Adjustable waist belt 7.Reinforced handle with web ergo 8.Back panel fully padded with breathable mesh and hollow chamber foam, spiral channel for air ventilation 9.CD/MP3 player pocket with exit port for earphone cable