The main difference between disposable shower caps for women and regular shower caps is that disposable shower caps for women are typically made of a thinner and more fragile material. This allows them to better conform to the shape of a woman's head, whereas regular shower caps are often made of a thicker, less flexible material that can be less comfortable to wear. Another key difference is that disposable shower caps are often designed with built-in elastic straps to keep them in place, while regular shower caps typically do not have these straps.