Real leather upper. Strobel construction for great flexibility and adjustment. Exclusive onSteam material - breathable, climate control, odor free lining. Thermoplastic extra light rubber mix outsole. Removable “4D Technology” footbed. The styles are carry over styles but with perforation on the uppers to make them more summery. This extra light outsole has trans-lucid pads which are anti-slip and very gummy and soft. The construction allows for greater flexibility and better adjustment. Leathers are very soft tumbled with a slight grain. Elastic trims are featured for adjustability and comfort.