This is American Rothco's interpretaion of the classic 'expedition rucksack' which can be seen on old black and white photos of explorers and mountain climbers from the old days. The backpack is made of cotton canvas with leather details - just like the original. Both leather and cotton canvas get a cool look as they get worn. The backpack has one main compartment and two smaller side pockets with velcro. In total the backpack contains 18 liters - a nice size for everyday use.