The all-new Thunder Pro GTX excels for fast, stable movement over rough terrain and multi-day outings with heavy packs. The secret to the Thunder Pro's comfort is Zamberlan's new Active Heel Pad (AHP) construction, which strategically positions a low-density PU insert pocketed within the heel of the insole. This transfers impact of the heel with the ground directly to the sole for continuous cushioning, reducing wear on your joints.

The Thunder Pro derives its toughness from durable, Hydrobloc-treated Perwanger leather uppers, lined with GORE-TEX waterproof-breathable membranes. For support in off-trail, rugged terrain, the soft collar protects the ankle, while PU toe and heel rands shrug off rocks and brush. Because every ounce adds up over long trips, the Thunder Pro uses a lightweight, high-visibility Vibram Junko Lite outsole with Megagrip for maximum traction with minimum weight. 

For serious hikers, backpackers, hunters, and adventurers seeking maximum durability and support in a lightweight package, the new Thunder Pro GTX is the ultimate choice.

Features Include:
▪ Exceptional Durability: Built with 2.0-2.2mm thick Hydrobloc® Perwanger® leather uppers, this boot offers unparalleled resilience and longevity on rough terrains.
▪ Continuous Comfort: The new Active Heel Pad technology ensures superior cushioning for all-day comfort, no matter the distance. 
▪ All-Weather Protection: A PFAs-free GORE-TEX® Performance Comfort lining keeps your feet dry and comfortable in wet conditions.
▪ Lightweight Cushioning: A recycled EVA wedge midsole provides exceptional cushioning and shock absorption, reducing fatigue on extended hikes. 
▪ High-Performance Fit: The X-Active fit on the Thunder Pro is for high-peformance on the mountain. This technical fit runs true to size (do not size down) with a slightly narrower fit than our ZBPK lasted boots.
▪ Reinforced Protection: Protective PU toe rand and heel area shield against impacts and abrasions, enhancing durability.
▪ Sustainable Craftsmanship: Featuring 100% recycled laces, an 80% recycled footbed, and a PFAs-free water-repellent treatment for environmentally-responsible performance.
▪ Outstanding Traction: Equipped with a Zamberlan Vibram® Junko Lite Megagrip® outsole, the boot delivers excellent grip and stability on diverse surfaces.
▪ Built for the Long Haul: Made in Italy, and resolable with original Vibram outsoles.