Timberland PRO 24/7 Comfort System: The Timberland PRO 24/7 comfort suspension system technology helped reduce foot fatigue, supports the arch and cushions every step Grip-Max Outsole: Wiper technology cleans a path, enabling the primary lug to make contact with a less-contaminated surface, resulting in superior slip resistance GreenStride: This natural and high-rebound foam is made with 75% renewable natural materials; Sugar cane and responsibly sourced natural rubber from trees Timberland PRO Rubber: Heat-resistant, durable rubber compound offers enhanced slip, oil and abrasion resistance Mark II: Mark II Oily wet #3 on American Olean tile exceeds .40