These are a subcategory within the other types of bikes.
The subcategory is a way of grouping work activities, sufficiently broad but self-contained to enable staff to be positioned within the overall framework.
An entirely new subcategory can be formed under "bathing items" to account for the bubbles and baby washes, washcloths and toys that are used during bath time.
If you click on Shoes, then Women, then Dress, and look under Sandal and then the subcategory of Strappy, you'll have it narrowed down perfectly!
Your best bet for finding the style you want within this subcategory of bras is to search online rather than in stores.