Carbon Technology training pads are 25% thicker and absorb twice the amount of liquid than normal training pads. Each pad has 5 layers, which is designed to keep your floor clean and dry. The top layer is made of our Carbon Technologybthat provides max absorption and removes odour quickly. The middle layers help turn liquid into gel, which holds more fluid than usual training pads. The bottom layers are made with high endurance that prevent the pads from wearing and tearing, keeping the liquid from staining your floor.