The upper of the shoe is made of continuous natural smooth FULL GRAIN leather, which is characterized by the highest quality. The lining - sweat absorbing antibacterial textile. The skin junctions are double stitched. Shoes have quick fastening system. 3M Thinsulate® 200g membrane that provides cold isulation (CI). Special CannyTex® membrane provides great water resistance properties (WR). Sole - two layers PU, flexible, patterned, antistatic. Resistant to grease, oil products, has great anti-slipping properties (SRC). Sole protected with light and flexible non-puncture Kevlar type insert. XL size glass fiber toes protection.