Belly bands wrap around the male dog's belly and prevent him from urinating on objects. If the male dog is wearing the belly band and he marks, the belly band will function like a diaper and hold the urine. Male dogs don't like being wet and they will normally stop marking once they learn that marking makes them wet and uncomfortable.
Male Dog Belly Band Wrap | Male Dog Diaper | Jack & Jill Dog Diapers (jjdiapers.ca)