I have owned these shoes since March 2014. This is by far the most comfortable pair of shoes I have ever purchased. I am a nurse and wear them 5-6 days a week.  However, recently they have developed a terrible odor on the bottom of the shoe.  I washed them twice, bleached them and even tried borax.  And still the smell remains.  Co-workers complained of the smell as well, so I know I'm not crazy!  I have read many reviews about these shoes developing a &#34;cat urine&#34; odor from the breakdown of the rubber soles; apparently if the bottoms get wet and do not dry out, the soles breakdown and release an ammonia. I am so disappointed to be getting rid of these shoes after paying $120 and only getting a 1.5 years out of them!  I recently wrote New Balance requesting a refund and I am awaiting their response.  Apparently, this is an ongoing product defect that has yet to be fixed for quite some time.  So, beware!