These underpads comes with triple-layer protection. A top sheet, bottom sheet, and an absorbent core. The polymer or fluff core lining keeps the urine odor locked within the pad so the smell doesn't spread. Comfortable with a pad that keeps all the moisture in and doesn't leak. Cover and protect furniture from a small chair pad to an extra-long full-length bed pad or something in the middle that covers sofas and couches. Also useful to use as portable disposable baby pads, these are perfect to carry around in a diaper bag to change your child wherever you go. The waterproof backing and odor locking core also make these ideal pee pads to train dogs and keep your home dry and free of bad smells.