MWP stands for Mountain Water Process. We just got this lot of decafs back from the MWP facility in Mexico and it is an excellent coffee. Truth be told, a few of our cuppers did not look at the prep while cupping this decaf and didn't know that it was a decaf until we discussed the coffee after-the-fact! It is a nice, sweet, complex cup... Look for more MWP decafs in the future.