Every All-absorb training pad includes 5 layers of products. The first layer is made from non-woven fabric, which enables canine urine flow through to the absorbent core quickly. The 2nd layer is made from paper tissue, added with canine attractant and baking soda. The third layer is a mix of super-absorbent polymer and fluff pulp, which forms the absorbent core that can take in and turn canine urine to gel instantly. The absorbent core can hold 3 cups of liquid. The fourth layer is also made from paper tissue. The back layer is made from water-proof PE movie, which prevents moistening your floor.