Completely waterproof backpack Carry your Valuables anywhere with confidence knowing they will always be dry and dust free with this innovative travel backpack. This bag is manufactured from Heavy Duty 500D 3 layer Vinyl/ polyester Material for maximum strength, all seams are carefully heat bonded to ensure water resistance as are the extra reinforcing panels at all strap mounting points and pockets etc. Other features include: " 30 litre storage capacity " Roll top opening to prevent water entry " Outer quick access pocket " Adjustable shock chords to secure any external Items " Cushioned / vented back support panels for riding comfort " Rubberised carry handle " Night safety reflective stripes.