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. ELECTRICAL HAZARD PROTECTION: Provides secondary underfoot protection against live electrical circuits, electrically energized conductors, parts or apparatus: Meets ASTM F2412-18a, ASTM F2413-18, ASTM F2892-18 and CAN/CSA-Z195-14 standards. SEAM-SEALED WATERPROOF: Seam-sealed waterproof leather for durable waterproof protection; Special tanning repels moisture for waterproof protection. TIMBERLAND PRO RUBBER: Heat-resistant, durable rubber compound offers enhanced slip, oil and abrasion resistance. 200g Insulation