"Cath" could refer to a specific brand or line of gym clothes, but without more context, I'll provide a generic product description for gym clothes under the brand name "Cath":
Introducing Cath's premium line of gym clothes, meticulously designed to elevate your workout experience to new heights. Crafted with the perfect blend of comfort, functionality, and style, our gym apparel is your ultimate companion for pushing boundaries and achieving your fitness goals.