Tan brown https://buffalojackson.com/collections/canvas-backpacks-and-travel-rucksacks/products/vintage-backpack-dakota-waxed-canvas-and-leather 

Dark blue coal https://buffalojackson.com/collections/canvas-backpacks-and-travel-rucksacks/products/vintage-backpack-dakota-navy 

Hacks https://buffalojackson.com/collections/canvas-backpacks-and-travel-rucksacks/products/vintage-backpack-waxed-canvas 

Who works in the V-Ray version lower than 3.1 be careful in some materials in the BRDF section there is a Microfaset GTR (GGX) if your version is older than 3.1 then the BRDF field will be empty. Choose Blinn Phong or Ward – which is preferable to you.

Objects have the correct scan.

Smoothing model