The Chiruca Montreal GORE-TEX boots are made with Nubuck and split leather. They have the GORE-TEX Performance Comfort lining and the sole is 2 density: Phylon midsole and Vibram outsole. It has an Omnific Megagrip compound.Features:- They are made with Nubuck and split leather- Weight: 493 gThey have the GORE-TEX Performance Comfort lining and the sole is 2 density:- Phylon midsole and Vibram Skate- It has an Omnific Megagrip compoundTechnology:- GORE-TEXGarments made GORE-TEX deliver maximum comfort and protection for a wide range of activities and weather conditions. GORE-TEX membrane is water and wind resistant ensuring no water gets in while allowing your feet to breathe. How is this achieved? Its pores are 20,000 times smaller than raindrops, but 700 times larger than water vapour molecules. This means, water cannot get in but perspiration can get out and the skin can breathe. Each membrane is tried and tested in the harshest weather conditions.