Some people have concerns about safely wearing one of these vests in a rain. However, the voltage of these vests is far too low to be dangerous, even if the vest gets completely soaked.
Rain jackets are essential for staying dry in wet conditions ... highly breathable and waterproof; Pertex Shield, known for its lightweight qualities, and H2No by Patagonia, which is highly regarded ...
It's not often that we see too many Arc'teryx gear go on sale. In other words, take advantage of this opportunity from REI because there's no telling when it'll come back around.