I’ve used a towel style bath mat for decades, I think it’s the most hygenic. It goes on the floor to shower, then gets hung to dry between showers.
I lay floors and hadn’t seen a “permanent” bath mat in years but ran into one today. It was that typical shag rug style, bright pink. This was a clean house but it was strange to me, I didn’t think anyone used those anymore.
I use a 100% cotton bath mat. About twice the thickness of a towel with a non-slip bottom. Gets hung to dry between showers. You can pick them up at Ikea for cheap.