Quote Originally Posted by John U View Post

On my C7 3LT Napa "leather", water does not soak into the so called "leather" meaning urethane coated.

Not sure about your Corvette but assuming some of the materials are the same or kissing cousins, from this page,

2020 Corvette Seats: Mid-Engine Car Offers 3 Seat Choices | GM Authority

The key word here being textile - to me this means VINYL or vinyl-like and that would make sense as to why water does not soak into your seat material.

All 2020 Corvette seats are equipped with 8-way power controls, and the up-level seats add more adjustment features.

Additionally, the seats are covered either in performance textile Napa or Mulan leather.

The Napa leather seats are available either with perforated only or perforated and sueded microfiber inserts, whereas the Mulan leather seats are only available with non-sueded perforated inserts.

Kind of the same idea as presented here,

How to Test for a Vinyl Convertible Top

Hand Model = Mike Phillips