"We have a 16 year old Scottish terrier and I've purchased three of these belts in the medium size. As other reviewers have said, the dog doesn't mind the belt at all, he acts as if it isn't even there. I also agree with other reviewers that the pads sold at Petco are completely useless. After much trial and error, we have finally found the perfect pad - we use adult human male incontinence pads (like Poise or their generic equivalent) in the Ultimate/Supreme absorbency. Most of the time the Poise pad completely absorbs the urine, but sometimes overnight it doesn't quite hold it all and the belt needs to be rinsed and dried. That's when the back-up belts are used. I also have a Bissell Spot-Bot that is great for easy clean-up of the times when the carpet gets wet because the moisture has leaked through the belt. These two products together make caring for an older pet and still keeping a clean house a lot easier."