The Brass Knuckle SmartShell heavy duty protective glove, from Safety Today Inc., is designed to offer heavy duty cut resistance, light oil and moisture resistance, non-tacky slip resistance and shock-absorbing impact protection. The BKCR4599 delivers ANSI level 4 cut resistance in a very breathable, durable and flexible glove. On the palm and fingers, the BKCR4599 offers three layers of protection. The liner is an ultra-high-performance polyethylene and spandex composite that delivers heavy duty cut resistance without bulk. Bonded to that first layer is a gray polyurethane fabric topped with a grippy nitrile surface; a barrier to light-oil or other light-liquid penetration. In critical areas of the palm, padding provides impact resistance.The back of the hand is loaded with sonically welded thermoplastic rubber padding.