That is a belly band. Loco is my little marker boy. I've tried everything to break him of it with no success. Even when he goes outside to potty, he has rounds that he makes...a squirt here, a squirt there. He even goes to each place the other 3 dogs potty and marks over their's and occasionally, he'll mark my poor female while she's midsquat.
I just put a sanitary napkin inside the belly band to absorb the pee & to pull it the wetness away from his skin.
Alright that makes sense. I never thoght of doing that before. I know what you mean by marking except i have the opposite problem. My girl Elie will lift her leg and pee on Digger. She also marks over his potty area. Somehow they got thier roles reversed.