I have had a set for a couple of years, one thing that has happened over time, is the fabric starts to pill. I think that is the word for it, kinda like when lint starts to ball up on a sweater. I would wash them on the delicate cycle, and of course hang dry them. Even with the wear over the years, my Toggs still keep me dry.
I have a few pairs of Toggs and I love them. I can’t speak as to how to wash them, I am the smelly guy in the boat After having these for a number of years, mine have done the same things as stated above, but they do keep me dry.