Timberland PRO 24/7 Comfort System: This comfort suspension system technology helped reduce foot fatigue, supports the arch and cushions every step Waterproof Membrane: Delivers maximum waterproof protection and meets ASTM F1671-07 safety standard. Steel Safety Toe: Metallic, asymmetrical-shaped toe cap that meets US and Canadian safety standards including ASTM F2412-18a and ASTM F2413-18 I and C impact and compression safety standards and CAN/CSA-Z195-14 Grade 1. 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 and CAN/CSA-Z195-14 standards.