Men’s 11” Waterproof Comp Toe D3O® Internal Metguard.Waterproof SCUBALINER™ – Carolina’s Exclusive Proprietary Waterproof Lining System.Composite Toe – A Non-Metallic Safety Toe for environments where steel is not appropriate. Reduced cold-transfer in cooler environments and meets the ASTM Standards for compression and impact testing rating of ASTM F2413-18.Electrical Hazard – Footwear tested by an independent lab that can withstand applications of 18,000 volts at 60hz for one minute without leakage.D30® – D30 uses patented, patent-pending, and proprietary technologies to make rate-sensitive, soft, flexible materials with high shock absorbing properties. In a market saturated with inflexible, uncomfortable, and substandard metatarsal protection, D30® Met Guards offer a low profile, soft, and flexible solution.