Hi-Tec Men's Cascadia eVent WPI Backpacking Boot 100% Synthetic and nylon Vibram sole Waterproof and breathable eVent membrane Moisture-wicking lining Ion-mask quick-dry, easy-clean liquid repellant treatment Stabila-Flex Elite contoured bi-fit board TPU heel locking system Built to keep you dry, this backpacking boot delivers support and grippy tread for challenging terrain.