Wired did a deep dive into the degradation of polyurethane sneakers. Basically, organic molecules don't like moisture, heat, or light. After sufficient of any of these they crumble or melt.
https://www.wired.com/2015/05/sneakers/
How much does this affect my year-old runners? Inquiring minds would like to know. And if I *must* buy new shoes, then that's important too.
'It never gets easier, you just get crazier.'
https://www.wired.com/2015/05/sneakers/
How much does this affect my year-old runners? Inquiring minds would like to know. And if I *must* buy new shoes, then that's important too.
'It never gets easier, you just get crazier.'