Just like babies, your dog's skin can become red, chafed and sore from contact with the diaper, belly band and get diaper rash from urine-soaked in the diaper and belly band.
Make sure that the lining that you use is soft and absorbent. Make sure are comfortable, not too tight that they will chafe the skin.
Change the diaper, belly band every time the dog pees. Do not leave your dog in a wet diapers, belly band as it can be very uncomfortable.
Female Doggy diapers & Male Belly bands are designed for only the collection of urine and are recommended to be used with a disposable pad.