One of my two males has worn a belly band most of his two years. He is neutered but simply doesn't mind peeing on himself or anything else. We've used two kinds of belly bands sold on Amazon or at Petsmart, but the rest I've made myself because he's got a long, narrow waist and when he scratches his back, the band scoots down too low (his sprinkler system becoming free to christen anything nearby).
We also buy human bladder-control pads and cut them to size, sealing the open edges with paper medical tape so the gel crystals won't leak out. It's tedious, but it helps keep his skin dry and rash-free.
Good luck with your little boy-bander.
