5 layers of protection hold up to 2-1/2 cups of liquid for up to 8 hours. The poly-lock core locks in liquid so it doesn't spill out and it's leak-proof, so you'll preserve the floor underneath from any moisture damage. House training is easy because these pads are specifically scented to attract your puppy to them and encourage use. After your pup takes care of business, you won't come back to a smelly home since these pads release a fresh scent upon use.