Yes, synthetic rubber is a common material found in shoes and boots.
The sole of footwear is more than likely the place you will find
synthetic rubber. Synthetic rubber is a polymer with a wide range
of applications, some of which natural rubber cannot match; it's
other chief benefit is that it costs less to produce than natural
rubber. While natural rubber comes from a tree; synthetic rubber
is produced from a range of chemical processes. When it comes to
shoes, you may be wondering what the difference is between the two:
there is next to no difference, both rubbers can be vulcanized to
increase durability, the biggest difference is the cost of production,
therefore, cheaper footwear brands tend to use synthetic rubber.