These shoes are flat-out the best everyday shoes I have ever had, including Merrill and Doc Martin. I am extremely tough on shoes and usually have to replace Merrill's etc every 2 or so years. My wife got these for me for a trip to Belize for ocean & jungle wear, so they have been exposed to the most severe environments. I've been wearing these things every day for over 3 years!!I started wearing them every day because they're so comfortable, fully expecting them to fall apart after a year or so of use on concrete & blacktop... I usually wear out one side of the heel - BUT NO! The soles don't even look worn. I think the spongy layer above the bottom sole is keeping the sole from wearing unevenly. The only thing I have noticed is the wrap-around toe material is getting a little stiff, but still not cracking or anything.