In 2030. we will mark 100 years since the invention of neoprene material, which is a wonderful invention for water sports fans.
Even in the harsh conditions in winter and spring, 3-4mm thick neoprene suits help us to keep our body heat, even if we fall into the river. We also use neoprene shoes 5mm thick.
Here you can see neoprene suits and shoes :
https://kayak-ekipirovka.com/neopreni/hiko-long_john_paddler
https://kayak-ekipirovka.com/neoprenovi_obuvki/hiko-rafter