Which type of clothing does Vineyard Vines primarily focus on?

Vineyard Vines primarily focuses on polo shirts as a significant part of their clothing line. The brand is well-known for its preppy, casual style that embodies a coastal lifestyle, often showcased through their iconic whale logo. While they do offer a range of other apparel, including activewear, their specialization in polo shirts is a hallmark of the brand. These shirts are often associated with both comfort and style, making them a popular option for casual and semi-formal occasions.

In the context of the choices provided, it's important to note that while activewear can be part of Vineyard Vines' offerings, the brand's identity and marketing heavily emphasize their polo shirts as key products. Thus, focusing on polo shirts helps best describe their primary clothing category.