I bought a pair of Thom Mcan shoes in July from K Mart, they have the new Poron 4000 Lifetime comfort soles. I wore them off and on during winter, went to clean to put away for summer and noticed that the new Poron inner sole has fallen to pieces. Took them back to K Mart but they would not do anything.
This would have to have been my7th pair of these shoes over the years

Now they are my last because the Poron 4000 Lifetime Comfort olny lasts about 6weeks