CPP™ Heavy-Duty Aprons - Reinforced Neoprene, Hycar, and Urethane for Rugged Wear. - CPP™ Heavy-Duty Aprons offer a broad spectrum of protection. Neoprene styles are resistant to a wide range of chemicals. Hycar styles (a tough nitrile blend) are ideal for grease and animal fats in cold conditions, while Urethane styles offer lightweight comfort and long wear. Available in a variety of weights and colors.