Whether for school or work, you can always find a good use for a backpack. It is made from several materials, including cotton, and it holds 48 litres.
See everything within Fjällräven Singi
From Amazon
Fjallraven Singi 48 Backpack - Dark Olive, OneSize
The product is available from £185.99 at international stores.
The Bushcraft Store
Fjallraven Singi 48 Rucksack - Dark Olive - Rucksack