· Activated Carbon – Superior odor control and the black surface can hide the annoying pet urine stains.· 5-layer Design - The COCOYO Training Pads are made of 5 layers of premium materials to keep your home clean and odor free.· Suitable for Dogs of All Ages - The COCOYO Training Pads can be used for dogs of all ages and breeds, perfect for puppy potty training, illness recovery, long stays at home and traveling.· Best Value & Good Choice for Puppy Training Pads - You can use these dog pee pads on their own, in a puppy crate, or even as a liner. A necessary addition to the kennel. A great choice for your dog's daily needs.· Leak Proof Protection - Each COCOYO training pad has a PE back layer with an extra edge to prevent leaks. The absorbent layer absorbs liquid and turns it into gel for easy cleaning.