A few months ago I posted a thread sharing my experience with shopping for anti-leak accessories, namely plastic pants and a onesie. The thread can be found here, but it is now closed.
To recap, I bought a onesie from Baby Pants and a pair of plastic pants from Fetware. The onesie ended up being too big (I measured properly, the size chart was just wrong), and the plastic pants were too abrasive.
I've recently continued my search for ways to prevent/minimize leaking from a proper-fitting premium disposable. Today I received a new onesie and pair of plastic pants, both from Baby Pants, and I'm happy to say that my search is over! (for now...)
I ordered the "Honey Bear" plastic pants (which excite my inner AB in the perfect way) for $14.95, and the "Blue Dinosaurs" onesie for $29.95.
This time I ordered medium sizes for both, which made a night-and-day difference. I am 6'0", 185lbs, and when diapered my waist is 40" and my trunk from collarbone to groin is 35". In my previous thread I detailed my disappointment with the large onesie I ordered from Baby Pants, because even after 4-5 washes on hot, it was still too loose in the crotch to have any function (the whole point of getting a onesie was to prevent sagging/shifting in the night). The medium I got today is a far better fit than the large, and even before washing it the fit was comfortably snug at the groin. After a couple washes it hugs a full diaper perfectly, providing ample support without being uncomfortable or so tight that it presses the diaper out.
The plastic pants fit perfectly at the elastic edges on the waist and legs, but still have TONS of room for double or even triple diapering (being partial to disposables, I don't do this very often, but sometimes the mood does strike...). I love the design, and they do give me a lot of peace of mind about leaks when I wear around the house. The pair I got are printed vinyl Gary pants, and they do cause my skin outside the diaper to get a little hot and clammy. I suspect that either terry-lined or PUL plastic pants might be more comfortable, but for my first pair, I couldn't be more pleased.
I'm wearing both over an Abena M4 right now, and I'm a happy baby!
Hope this helps anyone who is looking to offset sagging/leaks or is just looking to add a onesie or plastic pants to their AB wardrobe!