Sounds like they're some sort of synthetic leather in the Amazon listing. https://www.amazon.com/Worth-Mats-Weather-Leather-Waterproof-2012-2018/dp/B01L73NKXM

They look quite nice; I'm still using the stock cloth mats in my car as I didn't want rubber ones(I drive barefoot most of the time). I might have to give these a try; I do wish they sold just the front set though.