I am a 29yr old male and wet very heavily through the night. In terms of products available now, I can recommend the Abri Form Maxi, and the Depend Super Plus Briefs (the Depend have triple leg barriers - the only product I know of that do).   I suffer from overflow, so there is a slow but constant stream. For me a product that wicks effectively ensures that I get the most out of each diaper, so I go for products that use a combination of absorbant gels and paper pulp (erring more towards pulp). If the incon is more urge in nature (i.e. whole bladder volumes are released at once) then it is important to go for the faster absorbing briefs (more gel) as otherwise the free liquid can leak before the brief has had a chance to absorb or migrate to "dry" areas of the brief.   Finally, "doubling up": Back in the day, when adult product where pretty shameful I did play around with this and got it to work. The trick is to perforate the waterproof backing of the inner brief. Go crazy - basically you don't want the inner to try and hold anymore than it was designed to do. You want the excess to have a nice easy route to the next brief so it doesn't try and go anywhere else. I would make long incisions down the length of the pad concentrating on the front and crotch (being male).   I would recommend the Abena or Depend first though as I'm sure your life is busy enough without having to do all this extra prep work. On the face of it these products are more expensive, but in reality you will probably only need one change for the night. Also try a cotton lined plastic pant over the top to catch any leaks.   Best of luck - Simon