On the Internet, no one will know that you have been working for months to put swimsuits on kitties.

This one was quite tricky to fit though.
Usually i just turn off all fur that come under fabric, but not in this case. Here i used a Dforce simulation to physically wrinkle hairs under a transparent swimsuit.

Gris swimsuit by Rendorgal:
https://www.renderhub.com/rendorgal/gris-swimsuit