A hydrophobic coating is added to the mousepads to make them waterproof, the amount of time this coating lasts is variable on a few factors but should typically last anywhere from 2-8 months in normal use, the surface is quite similar and smooth all across the board in both the options. Do note that there is a possibility of the color lightening in the waterproof variant of the mousepad after wash if it is a dark color, We will be shortly uploading a video on this page illustrating how one can clean the pad In the meantime you can contact us if you need assistance.