In addition to the main compartment, there are many pockets and a place for everything (large binder, tablet, magazine, textbook, carabiner key ring, zipped net for CD, 4 pens locations ...). I had not noticed that the shoulder strap is sewn and therefore (firmly) irremovable. This is not a disadvantage. Set to tighter, completely folded on itself it measures about 80 cm (measured from the highest part of the bag). It took 2 minutes patience to slip the loop inside protects the shoulder and adjust the shoulder to the length that suits me. The outer fabric seems strong (but not repellent). The article perfectly matches my expectations. Bought at 19.95 the value is excellent. Impeccable packaging and delivery.