Jack wolfskin thunder bay mens walking boots these jack wolfskin thunder bay mens walking boots have been engineered with texapore membrane which ensures that these boots are waterproof and breathable whilst the winter grip sole supplies excellent traction and the foam midsole cushions each step you take these walking boots also benefit from having a nanuk fleece lining to keep your feet warm during winter excursions and the jack wolfskin branding completes the great look mens walking