The sewing process created by Charles Goodyear J.R. over a hundred years ago, is a circular, continous stitching which insulates against heat and damp and adapts the insole perfecttly to the foot, making the shoe comfortable and resistant from the first day. Something which other shoes only achieve when you are about to throw them away. 1. CIRCULAR AND CONTINUOUS STITCHING. The thread is made of a special fibre and is practically unbreakable. 2. INNER SOLE MADE OF CONGLOMERATE AND NATURAL RESINS, protected by the leather outer sole to form an insulation chamber against the cold, heat and damp and which adapts perfectly to the shape of the feet, providing great comfort and resistance from the very first day the shoe is worn. 3. BAY LEATHER SOLE. Flexible and high quality.