Mammut Blackfin III Mid DT Hiking Boots - Men's Black/Black US 8.5. The lining is made of Absolute Aluminia Thermal Insulation to keep your feet warm while the breathable and waterproof DRYtech membrane keeps them dry. The Blackfin III ensures you stay warm dry and surefooted on your winter hikes. Specifications for Mammut Blackfin III Mid DT Hiking Boots - Men's: Manufacturer: Mammut Gender: Male Weight: 590 g Footwear Type: Shoes Color: Black/Black Fabric/Material: Dropstop Textile Lining Material: Dry-Technology Age Group: Adults Men's Shoe Width: Medium Shoe Height: Mid Features of Mammut Blackfin III Mid DT Hiking Boots - Men's Completely waterproof thanks to PU membrane with bonded seams Inner shaft with aluminum insulation Absolute Aluminia Thermal Insulation Board lasting Protective rubber border Vibram Outsole Package Contents: Mammut Blackfin III Mid DT Hiking Boots - Men's Mammut 3030-04810-0052-1075: Blackfin III Mid DT Hiking Boots - Men's Black/Black US 8.5