Carhartt Canvas Backpack. This no-nonsense pack is built for everyday hauling. Made of canvas with a water-shedding coating, it can easily handle any work or school commute. 500D polyester Rain Defender durable water repellent (DWR) Large main compartment with elastic pocket Front zippered pocket with 2 mesh pockets and key fob Mesh side pocket Padded shoulder straps for comfort Carhartt label sewn on front Capacity: 21L Dimensions: 17.5″h x 12″w x 6″l .  Embroidered HNTB logo on front pocket.