You can carry the bag in two ways, in your hand or over your shoulder.
A perfect replacement for a disposable plastic bag. If you plan to carry groceries home they need to be packaged or covered in paper, the bag is not approved for direct contact with food.
A pocket inside the bag make it easy to keep track of small things.
Easy to keep on hand since it can be folded into its own pocket and fits in your handbag, briefcase or coat pocket.