Designed for extended backpacking, long treks, and four season hikes, Zamberlan's Vioz GT Backpacking Boots deliver exceptional cushioning, Gore Tex protection, and Vibram traction and grip. . TPU stabilizer provides maximum stability and locks the heel in place. Vibram 3D rubber outsole with large, deep lugs for long wearing traction and stability, large contact toe area for better grip and durability, undercut heel for secure braking, self cleaning grooves. Interior Gore Tex bootie for waterproof protection and breathable comfort. Hydrobloc full grain leather upper for durability and support 2.6 mm thickness. Durable, low density PU polyurethane midsole for cushioning, comfort, balance, and control. Rockered profile for easy toe off and better walking action toe bumper for enhanced protection and durability. Flex STM: multidirectional ankle joint for lateral support, comfort, and freedom of movement of the ankle with overall stability. Thermoplastic toe and heel with sculptured padding help hold the foot in place and protect it from tree roots, stones, and rocks. Self locking, double hook lacing for secure hold. Z Comfort anatomical footbed to absorb and wick moisture, add cushioning, reduce friction, improve foot alignmentstability, allow natural foot flex and air circulation. Zamberlan Air System ZAS: constructed and designed to optimize comfort and breathability of the boot. Made in Italy.