While you're on your way to potty training your puppy, protect your floors with Training Pads from Up&Up™. These leak-proof pads are super absorbent, contain messes and trap in odors to help keep your home smelling clean. A built-in attractant encourages your pup to use the pad, so you are one step closer to getting them to go outside. In addition to training your puppy, the Up&Up™ pads also work well for elderly or ailing dogs or dogs that are home alone. Both of who do not have the access to the outdoors in a timely fashion. These pads have proven to be the strongest and most effective pads in the market! Large and X-L are determined by the size of the pad. You can decide what your loved one needs based on their size and potty needs.