I looked at Weathertech, and a few other similar mats. Then I found Broadfeet mats. They are custom-fit, look way better, waterproof, and easy to clean.https://www.ebay.com/itm/141830192080
I ordered the Black & Gray, and they look really good. Front and rear are $135.99 with free shipping.
2015 i3 Rex, Capparis White, Tera World, Technology & Driving Assistant, Parking Assistant, Harman Kardon Audio System, 20 inch wheels, EVoInnovate EVSE