[5-LAYER CONSTRUCTION] Our training pads are made with 5 layers: non-woven cloth as the first layer to allow urine to flow through; the second and the fourth layers are made from paper tissue to add absorbency; the third layer is also the core layer is made from Super Absorbent polymer, and the back layer is a water-proof plastic protecting layer. [QUICK ABSORBENT & LEAK PROOF] With a Super Absorbent core that can lock in moisture by instantly absorbing and turning liquid into gel, each training pad can hold up to 3 cups of water. This product also featured with plastic back and border to prevent any leaking. [BUILT-IN ATTRACTANT] With a built-in attractant that helps direct your dog to the pad, which could help you achieve a successful housebreaking. This training pad not only can absorb odor and pet urine, but also help protect your expensive hardwood and carpet. [MULTI-APPLICATION] This product can be used for house-training puppies or assisting senior dogs, this product can be placed at home when you are outside, or in dog crates when traveling.