Quick answer. Crinklz.
Long answer. These are by far the most absorbent diapers out there. They do not have a tape landing zone either, so you can properly size them like a diaper is supposed to be (meaning the waist band actually extending up to your waist line).
I can actually use them for a full 24 hours, while still staying well hydrated too (though with rashes you probably don't want to). This puts their cost per day at the lowest I've ever seen. Overall cheaper than any "cheap" brand for sure.
Best part of all, they have never once came close to leaking on me. They also have a nice soft shell, and cute baby fur prints. Depending on your personal preference, it could be a good thing for how much they swell up too.