Well being as its gortex it cleans well and stays waterproof. Also quite tough on the rip proof side. They are after all made for nobs who traipse through the brush.
Tbf i normally only wear it if its going to completely piss down or will be so cold that multiple layers are required.
Matt Hayes is to blame, I saw him wearing one on TV and thought it looked comfy. I stopped at the stupid woolly ski hat though.