We often get questions about how to care for Zamberlan boots. One key factor in properly cleaning a boot is whether it has Gore-Tex waterproof and breathable liners. When cleaning boots with Gore-Tex liners, it is best to follow the directions straight from the source...Gore-Tex.
Please follow the instructions at the link below provided by Gore-Tex:
We hope this helps you maximize the life of your boots and the life of your Gore-Tex membranes. You've made an investment to buy the best, so take care of them and they will take care of you.
All the best,