HP Travel 18 Liter 15.6 Backpack (6B8U6AA) compatibility - Fits most 39.6 cm (15.6-inch) Color - Iron Grey Padding material - EPE foam Interior lining material - 100% polyester Carrying strap - Ergonomic; Pads; Shoulder Closing system - Zipper External pockets - Tablet; Accessories; 1 Quick access; 2 Water bottles/umbrellas; Padded laptop; Pen loop; Tracker Security features - Lockable zippers; Reflective material; Tracker pocket Laptop compartment size (metric) - 290 x 30 x 420 mm Laptop diagonal (metric) - 39.6 cm Package Dimensions (W x D x H) - 290 x 160 x 420 mm Number of boxes per base layer - 6 Weight - 0.51 kg