I ride with my Brooks cover on the Brooks saddle in the rain. I rode it one time in the rain on a tour with no cover during stops at red lights and such, it would get wet. I swear, that since that day it feels a little sloppier, especially on the sides where my sit bones go. I wish I had used a cover to ride on that day. I find that the covers do not make the saddle uncomfortable just different so I use them whenever there is rain.