Upper genuine full grain leather with PU reinforcements over the toes. Shoes back part strengthened with TPU Support Structure ®. Fully lined with fur and Thinsulate 200g membrane that provides  Cold isulation (CI). Insock made from special, high density PU ensures best comfort, also extra fur lining insock for extreme cold conditions. YKK zipper hided by velcro fastened leather flap. Sole - double density PU, provides slip resistance (SRC). The outsole is particularly abrasion-resistan, antistatic, oil resistant. Shoes fastening - Nylon system ®. Composite toe cap size XL. Sole is protected by flexible and light Kevlar insert.