Chlorine eats up my binders. Maybe not immediately, but definitely after a while. I use a tri-top from Underworks, and usually by the time I get around to using them in the pool, they're somewhat old but still definitely intact. After a few weeks of swimming in them, the back layer begins to wear through and become kind of threadbare, and then a while after that, the front layers begin to be affected. They still work for a good amount of time, though.