Mainly for summer use or long hikes.Usually multiple fabric layers provide breathability when out of water and waterproofing when in the water.
Generally used with wading boots which are a lot healthier to use than wellie style boots
Vinyl is the standard material used in the majority of budget to extra durable waders.
The more durable versions are used for industrial work
Neoprene Waders: The default wader for cold weather or miserable conditions .An extended stay in cold water or weather is made much more comfortable by the use of neoprene.Moderately durable.