Anti-Fatigue Technology: A comfort system designed with shock-absorbing, geometrical technology that returns energy back to the foot to deliver all-day support and comfort. Exospine Technology: Originally engineerd for Pull-On work boots, this technology provides lasting structure and durability, as well as improved heel fit. Timberland PRO Rubber: Heat-resistant, durable rubber compound offers enhanced slip, oil and abrasion resistance. Electrical Hazard Protection: Provides secondary underfoot protection against live electrical circuits, electrically energized conductors, parts or apparatus and meets ASTM F2412-18a, ASTM F2413-18, ASTM F2892-18 standards. ReBOTL Material: Products with ReBOTL material contain at least 50% recycled PET (recycled polyethylene terephthalate, the stuff plastic bottles are made of) excepting trace materials.