Victrix™ Pro FS Silicone Dust Cap

Fits the Pro FS like it was made for it, which it obviously is. The silicone is thick enough that it doesn't flop around, but it's not a struggle to pop on and off. Keeps dust off the stick and buttons when it's sitting on my shelf between sessions.

It does the job of keeping dust off the controller, and the silicone feels sturdy enough. My only gripe is that it's a bit snug to slide on and off, so I have to be careful not to yank the sticks. Works fine for what it is.