[Help] What are y'all's thoughts on artificial grass potty areas?

If I were to move into an apartment with a back patio similar to these, is there a good artificial turf to be used as a potty area? In my mind I was thinking of 4x4 patch of "grass" that could be cleaned and hung to dry outside. Anyone done something like this before? via /r/dogs http://ift.tt/2swy2zp