We use cloth diapers. Over the years I've tried just about every type of diaper and cover in existence. I really like fitted diapers with wool covers best. My babies have very sensitive skin. Wool is completely natural and breathes, so it works best for their skin. I've also found wool to be more waterproof than many other covers.
We've been having problems with Owen lately though. For starters, he's four. Then there is the fact that the Ketogenic Diet works like a diuretic. We also have to push fluids to help prevent kidney stones ( a side effect of both the diet and Zonisimide). The result is that he wets a LOT! We've tried everything. He can soak through an overnight (guaranteed for up to 12 hours) disposable in one shot. The best thing we've found so far is a fitted diaper with a doubler worn with 2 covers, at least one cover being wool.
Owen absolutely LOVES his longies. I have a hard time getting him to even wear other pants. Longies aren't tight fitting around the thigh though. That means when he wets through his diaper it rolls right down his leg. I've never had this problem with the other kids or with Owen until we started the diet. While trying to come up with a solution I found this pattern on Ravelry. The pattern shows how to work the doubler into a pair of pants as they were being made. I wanted to add it to a pair we already had, so I just used a normal cast on and cast off and whip stitched it in place.
It just adds an extra layer at the wet zone. So far, it seems to be helping. He's still managed to wet through a couple of times, but much less than before. Unfortunately potty training still isn't going well. Hopefully he'll get the hang of that soon!