All of this explains why exterior rubber mats tend to be on the pricier side. Exhibit A: the $40 FIOZOR Rubber Door Mat. You can also opt for a doormat with mixed materials, like the ubdyo Rubber ...

Onlymat Natural Coir Solid Brown Rectangular Door Mat, Waterproof, Low Profile All-Purpose Entryway Rug Quickdry with Anti-Slip Rubber Backing for Indoor and Outdoor Use (120cm x 40cm) ...