The term “portfolio case” can mean different things to different people, so you should make sure you have an understanding of what will fall into this category. The traditional zippered portfolio is the first thing that comes to mind when you think of an architect portfolio case. It’s made of a semi-rigid vinyl with a grain texture that’s designed to mimic the feel of leather, but you can also find one made of a fabric that’s stretched around a wire frame. Canvas art bags (also called “student portfolios”) are at a lower price point, which is why they’re often used by students. Expandable portfolios are the most versatile because they can accommodate anything from paper to foamboard, and they will even carry framed art.