I too have a wider fore foot, but fairly medium mid and heal. I’ve struggled for many years trying to find the right shoe. When I found the Asics SS2, I was so happy. Then, I found out that it had a replacement , the SS3. Unfortunately, they completely changed the upper, and the fit was too narrow in the toe box. I found a cheaper pair of SS3’s at my local club for $70. So, I thought I would give them the good ol’ college try. They hurt so bad! I was thinking about trying to open up the the width in the front of the shoe. Cutting holes in certain spots, walking around the house in them wearing three pairs of socks, etc. Then I found my old expandable shoe trees, that came with a pair of Ecco dress shoes I bought long ago. I opened them up, jammed them in the shoes. I’m impatient, so I grabbed a blow dryer, and started heating up the TPU. It took some time, a total 10 minutes maybe. In the end, I let them cool down a bit, and wore a couple pairs of socks, and slipped them on. I could tell a huge difference right away, even with two pairs of socks on. I walked around the house for a little while, did dishes etc. I put the shoes trees back in them, and put them aside. The next day, I used them for a one hour drill session. They actually fit better than the SS2’s did! It didn’t solve the breathability issue of the full TPU upper, but the fit was awesome. I would imagine that this technique will work with any shoe with a TPU upper.
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