Before I proceed to slam these shoes for the pure garbage they are let me tell you about my former love for Mizzuno shoes, particularly the Wave Ascend 2-5.<br /><br />I first found and used the Wave Ascend 2 trail runners for an 800 mile segment of the Pacific Crest Trail.  I had hiked the previous 1800 miles with garbage shoes like these Wave Kazans.  I still have the shoes and will use them occasionally.  Since then I've used the Wave Ascends on every hike, run and disc golf trip I've taken.  The 8's quality has noticeably declined and I guess it's a good thing they discontinued them.<br /><br />The Wave Kazan....<br />I purchased these after a phone call with Mizuno telling me they would work great for me and there was no way in hell they would tell me where to find an older pair of their shoes. They suggested I start using their newer models. After ten miles in these shoes the inner heels collapsed and caused the hard plastic heel support to dig into my ankle.  Unfortunately I was in the middle of a 100 mile hiking trip and couldn't turn around.  I used my knife to cut holes in the plastic and hobbled my way to the end.  By the end of the trip the shoes were practically flat on the inner heels and had busted out the fabric over deflated part of the shoe.  I ended up getting holes in the heel and the toe box on the inner part of the shoes.<br /><br />If you buy these I wish you the best of luck in your endeavors, Mizuno used to make amazing products but I think they now prefer to save money and make garbage shoes.  I would make a pros and cons list for these shoes but there is no point.  I'm now using the Brooks Cascadia 9's and they are holding up well.  I haven't used the 10's but have heard they suffer the same problem as the Wave Kazans.