The Happy Tushies Wonderbag is designed so that the PUL (waterproof stuff) is not sewn to the woven/knit outer at all. The two compartments are completely separate from one another as well. Throw that "wicking" word out of your diapering vocabulary. At least, you won’t be using it around here!
Now that I have two bambinos in diapers I have found the Happy Tushies Wonderbag as my ‘go to’ wet bag! I am a bit picky and like to keep my toddler’s diapers in the separate compartment from my newborn’s breastfeeding only diapers. Just a personal preference, but super convenient.