Built quality is good. That's all positive things I can say about this product. As much as I wanted to leave a good review, here is genuinely how I feel about it after a couple of days of use. Firstly, it provides no arch support. I know this was not marketed as such but I would have thought that the blue gel cushion underneath would have done something to alleviate my arch problem but I have yet to notice its benefits. Secondly and probably most crucial in my case, the bumps at the heels of the insole make it painful to wear for a long walk. I need to readjust my feet several times after walking for a couple of miles. And lastly, it adds noticeable weight to my shoes despite its name &#34;Airr Lightweight&#34;.<br /><br />There you go, three concerns mean three stars dropped!