It is a faux leather tote bag. Since the material is very soft, it fits easily and conforms well. Since it's large, I think it can be used for commuting or school. It can also fit cardigans or outerwear for temperature adjustment, and you can carry things like tablets and laptops. The inside is made of a fluffy urethane-like material, giving it a soft texture. There is a mesh cylindrical storage space to prevent water bottles from rolling around inside, which is a thoughtful design!!