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June 9, 2014 by jmatlock88 | Tulsa, OK
"I was told this product was the replacement for IAS3720 ST Stability Insoles. In the past, the IAS3720 have been my absolute favorite insoles...even compared to prescription insoles! After buying this IAS4000-A product, the initial fit and feel was good. However, in about half the use length of my previous IAS3720 pair, the IAS4000-A pair disintegrated. The old set had nice a nice molded rubber bottom that prevented slip inside the shoe. The new ones slip and can squeak as you walk. The previous design's rubber bottom added robustness to the insole, allowing for a much longer life. I literally wore holes in this new set, as the pad is much thinner. The lack of quality of the IAS4000-A was so significant, I spent time calling around to find old stock of the IAS3720. I was lucky to find them for now, but I doubt I will have the same luck next time."
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