Hi-Tec Simply 8 Backpack Properties: Hi-Tec backpack capacity 18 liters Made of lightweight polyester, weight is only about 0.15kg. adjustable arms Additional features: two side pockets, reflective elements Material: polyester Color : yellow; Hi-Tec Simply 8 Backpack Properties: Hi-Tec backpack capacity 18 liters Made of lightweight polyester, weight is only about 0.15kg. adjustable arms Additional features: two side pockets, reflective elements Material: polyester Color : pink