You could call this retro. You could also call it natural or vegan. You look down upon other cyclists at the grocery store with their synthetic grocery panniers and feel oh so superior, and in their shame they never shop by bike again. Please don’t.
Instead use this sturdy canvas pannier for it’s function: carrying standard grocery bags — on your rear rack, or hanging from the top edge of a steel shopping cart.
Note: This model will have heel clearance problems with shorter-wheelbase bikes that are not designed to carry panniers. An adjustable-height rear rack can improve clearance in this case.