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. CarbonShield Technology: Engineered with nanotechnology, adds strength and unmatched protection, provides a better fit and reduces weight with a lightweight, non-metallic, asymmetrical-shaped toe cap that meets US safety standards including ASTM F2412-18a and ASTM F2413-18 I and C impact and compression safety standards. Waterproof Membrane: Delivers maximum waterproof protection and meets ASTM F1671-07 safety standard. Smart Comfort: our Smart Comfort hidden seam allows for controlled expansion for ease of foot entry into a typically rigid boot shaft. Exospine Technology: Originally engineerd for Pull-On work boots, this technology provides lasting structure and durability, as well as improved heel fit.