I bought these for a trip to the Rocky Mountain National park a few weeks ago.  They worked great.  I even rented a Razr UTV for a half day and muddied these things up.  I just wiped down with a damp wash clothe and they reverted back to looking brand new.  I like the reinforced bottoms that don't torque when you walk on rocks and weird surfaces.  This is my first pair of Merrill shoes.  I will buy this product line again.