Check this lovely Vinylon backpack by Fjallraven. The original was introduced in 1978 as the book bag for Sweden’s school children. In that year Fjallraven’s founder, Ake Nordin, hoped to sell 200 Kanken bags. He sold 400 and the next year sales reached 30,000. At this moment, 30 years after launch, this robust and useful bag is available at Blackbird and Oi Polloi.