Thick and solid fabric. I remember my father had such a canvas, he himself did it for hunting. Let's see how it will be in everyday use. Satisfied with the purchase!
The backpack for money is decent, tough, the bottom is hard flat, there are many compartments inside and outside. It would be nice to replace the zippers with metal ones and it would be perfect. The colors in the photo are distorted, the backpack is light in dirty khaki, inside the color of light leather.
My son (19 years old) liked the backpack-stylish, roomy, many pockets, the fabric feels never worn off.