Whether for school or work, you can always find a good use for a backpack. The material of choice for this bag is nylon and it is mostly intended to be a men's bag.
From Osprey Europe
Talon™ 36 - Stealth Black - L/XL
Trekkinn
Osprey Talon 36l Backpack Black L-XL
Hardloop
Osprey Talon 36 - Walking backpack - Men's Stealth Black L / XL